FHB Logo Facebook LinkedIn Email Pinterest Twitter X Instagram Tiktok YouTube Plus Icon Close Icon Navigation Search Icon Navigation Search Icon Arrow Down Icon Video Guide Icon Article Guide Icon Modal Close Icon Guide Search Icon Skip to content
Subscribe
Log In
  • How-To
  • Design
  • Tools & Materials
  • Restoration
  • Videos
  • Blogs
  • Forum
  • Magazine
  • Members
  • FHB House
  • Podcast
Log In

Discussion Forum

Discussion Forum

Sanding between coats of paint

jyang949 | Posted in General Discussion on June 10, 2013 01:57am

What is the point of sanding between coats of paint?

Smoothing the surface, so the next coat will be more even
or
Roughing the surface, so the next coat will adhere better

Janet

Reply
  • X
  • facebook
  • linkedin
  • pinterest
  • email
  • add to favorites Log in or Sign up to save your favorite articles

Replies

  1. JimB | Jun 10, 2013 05:30pm | #1

    Both, actually.

    Sanding will remove large defects (drips, sags, dust), while at the same time "roughing" the surface for better adhesion.  The latter effect is most important with hard, high gloss paints like enamel.

    It's important to use the right grade of sandpaper.  Too fine will take forever if the previous coat has many major defects, too coarse will leave sanding marks that require additional sanding with finer paper and maybe additional coats of paint.  You really want to just scuff the surface enough to remove the shine.

    1. jyang949 | Jun 11, 2013 11:14am | #2

      Very helpful, thank you!

      Janet

      1. sapwood | Jun 12, 2013 09:42am | #3

        Sanding a prior coat of paint is not needed unless you are covering very old, fully dried paint. As usual, its best to simply follow the manufacturers instructions. However, if the surface is rough, then sand prior to painting any coat. No amount of properly applied paint will cover dust nibs, dog hair, or drips without first sanding them smooth.

        1. jyang949 | Jun 12, 2013 10:47am | #4

          Dog hair

          sapwood wrote:

          No amount of properly applied paint will cover dust nibs, dog hair, or drips without first sanding them smooth.

          LOL. In my house, it's cat fur that gets into everything—but sometimes the cats do, too. 

          Once I was roller-painting a wall while listening to music through earplugs. When I bent down to reload the roller I saw, next to the paint tray, PAW PRINTS in paint. 

          Fortunately, the cat chose to leap onto a piece of furniture that was easily cleaned off.  But I'll never forget that sinking feeling...

          Janet

          1. gfretwell | Jun 12, 2013 04:27pm | #5

            Usually you do that kind of sanding when you are going for a shiny finish. It takes out minor imperfections and creates a good surface for the next coat. 600 grit wet paper is not unusual for guys painting cars but I use 200-400 most of the time.

          2. jyang949 | Jun 18, 2013 11:02am | #6

            Primer

            When you are going for a shiny finish, do you sand the primer?

            I applied primer but can still see the color differences from the wood grain and some repairs. Does this mean the primer is too thin? I think it is thick enough to sand without reaching bare wood.

            if the primer coat is too thin, should I apply an extra layer of primer (as opposed to an extra layer of paint)?

          3. calvin | Jun 18, 2013 09:28pm | #7

            Janet

            I'm no painter.

            Sand, prime, sand again-to smooth the raised grain from priming (more so w/latex).

            You should be able to apply two top coats w/o sanding, but hitting it w/ higher grit again won't hurt neither.

          4. efess | Sep 29, 2020 11:16am | #28

            It's been more than 7 years, just wondering if you've forgotten that sinking feeling yet?

        2. jyang949 | Jun 30, 2013 11:33am | #13

          Manufacturer's instructions were ambiguous

          sapwood wrote:

          As usual, its best to simply follow the manufacturers instructions. 

          That's what got me wondering about sanding between coats. This is my first time using Benjamin Moore Advance (waterborne alkyd) and the labels said

          [primer] Allow 8 hours to dry before sanding and applying finish coat(s).

          [paint] If a second coat is required, allow 16 hours to dry before sanding and applying second coat.

          Since it didn't say "sanding OR painting," it sounded as though sanding was always necessary. But did the entire surface need sanding, or just any flaws that became apparent?

          Janet

  2. DanH | Jun 18, 2013 10:05pm | #8

    Yes.

  3. IdahoDon | Jun 26, 2013 01:14am | #9

    Primer only needs to be a thin coat - it's just increasing adhesion between wood and paint.  If it's being used to hide underlying color that's a different type of primer and it goes on thick enough to hide whatever you're trying to hide but that extra thickness is only for hiding and doesn't affect the paint/wood bond, which would have been fine with only a thin coat.  

    If a wall/cabinet/trim has to be very smooth it's normally primed with what's called a high-build primer.  It's extra thick so it can be sanded perfectly smooth.  Then 100% acrylic paint is used (I like Kelly Moore) which sands very easily unlike most water based paint.   Sanding inbetween coats isn't needed for a good bond - it's just to keep the surface smooth.

    A more advanced technique to get the absolute best finish is to sand between coats and actually sand the final color coat - and top coat it with a clear acrlic.

    With oil based paints there is normally a certain amount of time between coats in which sanding isn't required (say 18 hrs), after which it is sanded with fine sandpaper so the next coat can properly bond.  All this type of information is available from the paint manufacturer.

    1. jyang949 | Jun 29, 2013 12:01pm | #10

      Sanding difficulties

      You said that most water-based paint doesn't sand easily. I'm using Benjamin Moore Advance primer, which is a water-based alkyd.

      When I used a random-orbit sander, the particles formed clumps that stuck to the primed surface and wouldn't come off with a brush or air compressor. A scraper worked, but I decided to give the next piece a lot more time before sanding.

      After a week of drying (although it's been very humid), the particles still formed clumps, but at least they stuck to the sanding disk rather than the primed surface. Stuck very firmly, too—the sanding disk didn't work for long. 

      Is this what you meant about sanding water-based paint?

      Is it better to sand by hand?

      Janet

      1. User avater
        MarkH | Jun 29, 2013 01:32pm | #11

        Is it better to sand by hand? YES

        I would use a sanding block, and a type of sandpaper suitable for sanding fresh paint, and use very easy strokes.  I like to use stearated sandpaper, because it has a built in lubricant.  Some say don't use it because the lubricant can cause problems with subsequent topcoats.  Another choice is Silicon Carbide wet and dry paper.  You can use some water with a little dishsoap as a lubricant, for great results.  Then there is aluminum oxide paper, which I don't use for sanding new paint, and never have.  I use it a lot for sanding old paint.  Garnet paper is available, but it's pretty much seen its day, skip that one, and skip flint paper too.

        1. jyang949 | Jun 30, 2013 11:06am | #12

          Types of sandpaper

          MarkH wrote:

          aluminum oxide paper, which I don't use for sanding new paint, and never have.  I use it a lot for sanding old paint.  Garnet paper is available, but it's pretty much seen its day, skip that one, and skip flint paper too.

          Must confess that I never considered the composition of the paper. I pulled the sanding disk off a hanger of unpackaged singles at the paint store. They were labeled with the grit size but nothing else—no brand name, no composition. 

          Why shouldn't aluminum oxide be used for new paint, and what is wrong with flint paper (which I've never heard of) or garnet paper?

          Janet

          1. DanH | Jun 30, 2013 04:35pm | #14

            My recollection is that flint lasts about 30 seconds -- the grit starts falling off as soon as you take it out of the package.

          2. User avater
            MarkH | Jun 30, 2013 05:04pm | #15

            I never have used aluminum oxide for sanding between coats, so it could work out for you, I dunno.  Garnet paper is outdated but has one advantage over all other papers, final sanding wood before staining. What Dan said about flint paper, yup. Stearated paper is Silicon Carbide, as is wet and dry paper.  Wet and dry can be used either way, but works best wet.  Stearated paper works better than wet and dry paper on dry surfaces.

            Power sanding creates heat and is too aggressive normally.  You may have been melting the primer from friction and that caused the balls of paint on the paper.  Most people probably don't sand between coats, but those that do mostly use hand sanding methods, or special equipment.

          3. jyang949 | Jul 01, 2013 11:35am | #16

            How about sanding sponges?

            Can sanding sponges be used for this purpose, or are they not as good as using a block sander?

            MarkH wrote:

            Power sanding creates heat....  You may have been melting the primer from friction and that caused the balls of paint on the paper.

            Clever of you to figure out the problem! So, it's back to sanding by hand, which is better for me, anyway. The vibrations from power tools cause numbness in my hands; then I have to wear wrist splints for a week. 

            Janet

          4. User avater
            MarkH | Jul 01, 2013 12:04pm | #17

            Sanding sponges work, but I'm not a big fan of them. 

          5. User avater
            Mongo | Jul 01, 2013 12:12pm | #18

            Hand Sand!

            After priming, it depends on the primer, but I hand sand usually with 180-grit and generate a fair amount of fine dust. Sometimes I hold the paper in my hand, sometimes I use a sanding block. But the surface ends up pretty darn slicky smooth. It can be "blotchy" in terms of there might be more primer left over here, and a little less left over there. As long as you haven;t sanded to bare wood all is well.

            I brush off or vaccum the surface, then tack cloth.

            If proper prep work was done to this point, the rest should be pretty easy. After the first top coat, it's more of a very light scuff sand than a full-blown sanding session. Just lightly running the paper over the surface to knock down dust nibs, etc. I sand with one hand and run my other hand over the surface, feeling for smooth.

            Clean, then apply the second top coat, and you're done.

          6. calvin | Jul 01, 2013 08:10pm | #19

            Yo Mongo

            You do it the way I've had success and I'm no painter.

            in addition,

            There are 11 kinds of people in this world-those binary folks and then that 11th that goes to a fest of not, even tho it's in Connecticutt-the state where that guy lives

            no?

          7. User avater
            MarkH | Jul 01, 2013 08:56pm | #20

            uhhhhh, I think there are 10 kinds of people, but WADDA I KNOW?

          8. calvin | Jul 01, 2013 09:53pm | #21

            uhhhhh

            I think maybe there's 12.

            Those binary guys and then you and Mongo.

            Festgoers that ain't said they're goin' this year.

            no?

          9. User avater
            Mongo | Jul 02, 2013 10:54am | #22

            Ah-ha!

            Your post had me wondering, so I looked around and found the fest thread. It's now on the calendar. We're hosting visitors from out-of-state coming in that weekend, but I might be persuaded to slip away for a day. They're my wife's friends after all.

            Sorry I missed you and the other kids at MikeFest Part Deux. August is always a brutal month for me regarding schedules due to long-standing and pre-scheduled family get-togethers.

            How 'bout the Sox and the Tribe? What a difference a year makes, eh?

          10. calvin | Jul 02, 2013 07:02pm | #24

            Well, here's hoping you can break away for the day.........

            I mean, so close................be a shame not to.

            And yes, but of course..............talking about it might jinx at least our end of the standings, and I've learned long ago.   Maybe there's a difference and maybe not.

            We started the June swoon early-like last yr almost to the hour-same record b/4 and after-only this time the Tigers have treaded water and we caught up.  This coming weekend and monday might do much to tell the tale for later in the season-we meet up with the motor city kitties in a 4 gamer.  But first, need to meet up with KC in their park.   Never an easy match.

            And your former boy-Masterson is throwing some good games-he recently "blacked out" but came back the next outing and recorded another shutout-3rd of the year.  If he maintains that class, and the rest do their part-who knows................

            Can't say it's very upsetting to see the Yanks faltering and relying on the injury report for a reason.  The Sox early in the year had guys in the lineup I had never heard of.   Man, it was like a new team.  They made it through that well enough.  Depth at a reasonable price is nothing to sneeze at.

            So, yeah-show up and we'll talk baseball.

            Joyce says hey.

          11. User avater
            MarkH | Jul 02, 2013 11:35am | #23

            12 ain't binary, now I don't know what either of us are talking about.  Unless, you're talking about decimal bitheads not going.  I can't make it this year to the fest, would like to, but things aren't the same anymore. 

          12. calvin | Jul 02, 2013 07:04pm | #25

            Mark

            yup, decimal points and not showing up.  Too bad, always a blast to get together with those ficticious names on the board-or in this case-across the boards.

            Don't know how I should act................

            Guess I'll just be myself, that aught to throw 'em.

          13. User avater
            MarkH | Jul 05, 2013 01:07am | #26

            Oh, just be yourself, it'll all be OK!

      2. IdahoDon | Jul 09, 2013 01:32am | #27

        Personally I'd trash your primer and get something designed to be sanded.  All the talk about how to sand a gummy primer has my head spinning - it's not difficult - simply use the correct product.  At this point you are better off topping the primer you have with a 100% acrylic paint that's sandable.   Kelly Moore durapoxy sands well by hand or sander....it only takes 320 grit.

Log in or create an account to post a comment.

Sign up Log in

Become a member and get full access to FineHomebuilding.com

Video Shorts

Categories

  • Business
  • Code Questions
  • Construction Techniques
  • Energy, Heating & Insulation
  • General Discussion
  • Help/Work Wanted
  • Photo Gallery
  • Reader Classified
  • Tools for Home Building

Discussion Forum

Recent Posts and Replies

  • |
  • |
  • |
  • |
  • |
  • |
View More Create Post

Up Next

Video Shorts

Featured Story

Pros of Apprenticeship Programs

Apprenticeship programs can be a valuable tool for residential builders to recruit, train, and retain skilled employees, offering a structured pathway for career advancement and equity in the trades.

Featured Video

How to Install Cable Rail Around Wood-Post Corners

Use these tips to keep cables tight and straight for a professional-looking deck-railing job.

Related Stories

  • Beat the Heat: Cool Innovations
  • A Practical Approach to Exterior Insulation
  • Making and Installing Wood Wall Paneling
  • Podcast Episode 683: Barndominiums, ERVs, and Radon Mitigation

Highlights

Fine Homebuilding All Access
Fine Homebuilding Podcast
Tool Tech
Plus, get an extra 20% off with code GIFT20

"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.

Get home building tips, offers, and expert advice in your inbox

Signing you up...

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
See all newsletters
See all newsletters

Fine Homebuilding Magazine

  • Issue 331 - June 2025
    • A More Resilient Roof
    • Tool Test: You Need a Drywall Sander
    • Ducted vs. Ductless Heat Pumps
  • Issue 330 - April/May 2025
    • Deck Details for Durability
    • FAQs on HPWHs
    • 10 Tips for a Long-Lasting Paint Job
  • Issue 329 - Feb/Mar 2025
    • Smart Foundation for a Small Addition
    • A Kominka Comes West
    • Making Small Kitchens Work
  • Issue 328 - Dec/Jan 2024
    • How a Pro Replaces Columns
    • Passive House 3.0
    • Tool Test: Compact Line Lasers
  • Issue 327 - November 2024
    • Repairing Damaged Walls and Ceilings
    • Plumbing Protection
    • Talking Shop

Fine Home Building

Newsletter Sign-up

  • Fine Homebuilding

    Home building tips, offers, and expert advice in your inbox.

  • Green Building Advisor

    Building science and energy efficiency advice, plus special offers, in your inbox.

  • Old House Journal

    Repair, renovation, and restoration tips, plus special offers, in your inbox.

Signing you up...

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
See all newsletters

Follow

  • Fine Homebuilding

    Dig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.

    Start Free Trial Now
    • Facebook
    • Instagram
    • X
    • LinkedIn
  • GBA Prime

    Get instant access to the latest developments in green building, research, and reports from the field.

    Start Free Trial Now
    • Facebook
    • YouTube
  • Old House Journal

    Learn how to restore, repair, update, and decorate your home.

    Subscribe Now
    • Facebook
    • Instagram
    • X
  • Fine Homebuilding

    Dig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.

    Start Free Trial Now
    • Facebook
    • Instagram
    • X
    • LinkedIn
  • GBA Prime

    Get instant access to the latest developments in green building, research, and reports from the field.

    Start Free Trial Now
    • Facebook
    • YouTube
  • Old House Journal

    Learn how to restore, repair, update, and decorate your home.

    Subscribe Now
    • Facebook
    • Instagram
    • X

Membership & Magazine

  • Online Archive
  • Start Free Trial
  • Magazine Subscription
  • Magazine Renewal
  • Gift a Subscription
  • Customer Support
  • Privacy Preferences
  • About
  • Contact
  • Advertise
  • Careers
  • Terms of Use
  • Site Map
  • Do not sell or share my information
  • Privacy Policy
  • Accessibility
  • California Privacy Rights

© 2025 Active Interest Media. All rights reserved.

Fine Homebuilding receives a commission for items purchased through links on this site, including Amazon Associates and other affiliate advertising programs.

  • Home Group
  • Antique Trader
  • Arts & Crafts Homes
  • Bank Note Reporter
  • Cabin Life
  • Cuisine at Home
  • Fine Gardening
  • Fine Woodworking
  • Green Building Advisor
  • Garden Gate
  • Horticulture
  • Keep Craft Alive
  • Log Home Living
  • Military Trader/Vehicles
  • Numismatic News
  • Numismaster
  • Old Cars Weekly
  • Old House Journal
  • Period Homes
  • Popular Woodworking
  • Script
  • ShopNotes
  • Sports Collectors Digest
  • Threads
  • Timber Home Living
  • Traditional Building
  • Woodsmith
  • World Coin News
  • Writer's Digest
Active Interest Media logo
X
X
This is a dialog window which overlays the main content of the page. The modal window is a 'site map' of the most critical areas of the site. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page.

Main Menu

  • How-To
  • Design
  • Tools & Materials
  • Video
  • Blogs
  • Forum
  • Project Guides
  • Reader Projects
  • Magazine
  • Members
  • FHB House

Podcasts

  • FHB Podcast
  • ProTalk

Webinars

  • Upcoming and On-Demand

Podcasts

  • FHB Podcast
  • ProTalk

Webinars

  • Upcoming and On-Demand

Popular Topics

  • Kitchens
  • Business
  • Bedrooms
  • Roofs
  • Architecture and Design
  • Green Building
  • Decks
  • Framing
  • Safety
  • Remodeling
  • Bathrooms
  • Windows
  • Tilework
  • Ceilings
  • HVAC

Magazine

  • Current Issue
  • Past Issues
  • Magazine Index
  • Subscribe
  • Online Archive
  • Author Guidelines

All Access

  • Member Home
  • Start Free Trial
  • Gift Membership

Online Learning

  • Courses
  • Project Guides
  • Reader Projects
  • Podcast

More

  • FHB Ambassadors
  • FHB House
  • Customer Support

Account

  • Log In
  • Join

Newsletter

Get home building tips, offers, and expert advice in your inbox

Signing you up...

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
See all newsletters
See all newsletters

Follow

  • X
  • YouTube
  • instagram
  • facebook
  • pinterest
  • Tiktok

Join All Access

Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features.

Start Your Free Trial

Subscribe

FHB Magazine

Start your subscription today and save up to 81%

Subscribe

Enjoy unlimited access to Fine Homebuilding. Join Now

Already a member? Log in

We hope you’ve enjoyed your free articles. To keep reading, become a member today.

Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine.

Start your FREE trial

Already a member? Log in

Privacy Policy Update

We use cookies, pixels, script and other tracking technologies to analyze and improve our service, to improve and personalize content, and for advertising to you. We also share information about your use of our site with third-party social media, advertising and analytics partners. You can view our Privacy Policy here and our Terms of Use here.

Cookies

Analytics

These cookies help us track site metrics to improve our sites and provide a better user experience.

Advertising/Social Media

These cookies are used to serve advertisements aligned with your interests.

Essential

These cookies are required to provide basic functions like page navigation and access to secure areas of the website.

Delete My Data

Delete all cookies and associated data