The metal lowerr panels of the door sidelites are peeling again. We bought the house 3 yrs ago, and last spring I fixed this problem, but it wasn’t quite this bad. Actually I did most of the work on the right side, and the left side is really bad now. What’s causing the peeling? There is no evidence of moisture in the wall. When I worked on the right side, I sanded it to bare metal, feathered the edges, primed with krylon metal primer, then krylon color.
“Put your creed in your deed.” Emerson
“When asked if you can do something, tell’em “Why certainly I can”, then get busy and find a way to do it.” T. Roosevelt
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I think that you missed a step: Clean off all dust, dirt, grime and salts with detergent or mineral spirits. Then apply paint under the proper climate conditions.
Eddie,
Is both the paint and the primer peeling, or is just the paint coming off the primer ? Are the panels galvanized metal ? I think the problem is going to be in the prep and steps taken during painting. If the metal is galvinized and the primer is not sticking, I am pretty sure you will need a special primer for the galvanized metal.
If only the paint is coming off and the primer is sticking to the metal ok, you might have not waited long enough, or too long between primer and paint. Also, see if the the primer needs to be lightly sanded before the paint goes on.
Make sure the paint and primer are compatible and that you are following all the steps in the directions.
Personally, if I was doing the job, I would go to my local auto body supply house and get an automotive primer.
And .... clean, clean and clean again :) I would also use an automotive product here too, like PrepSOl
Bill Koustenis
Advanced Automotive Machine
Waldorf Md
Does this door unit get a lot of direct sunlight on that lower portion where it is not shaded by the porch roof?
Could be too much thermal expansion.
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That was my first thought. It's getting uneven heat/cold. That and the paint is too thick or too inflexible.Spheramid Enterprises Architectural Woodworks
Repairs, Remodeling, Restorations
They kill Prophets, for Profits.
The front door faces generally south, so yes the lower portion does get sun when the upper portion is shaded. The metal is, I think, galvanized, and the paint & primer are peeling off as one layer."Put your creed in your deed." Emerson
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
Strip it with a hot gun. Scuff sand w/say 220. Wipe it down with anything but water or oil. Rustoleum black AUTO primer, and Rustoleum whatever color to top it over. That'll do ya.Spheramid Enterprises Architectural Woodworks
Repairs, Remodeling, Restorations
They kill Prophets, for Profits.
Wipe it down with galvaprep too. My shed door faces south, a salvaged galvanized fire door. The hunter green rustoleum has pretty much disapeared. Both paint and primer are peeling off. I didn't do the original paint job, just the top coat. It's hot enough in the sun that you can't hold your hand on it. I think the sun is burning the paint off. When it all falls off I'm painting it white.
Ok, I have a wagner heat gun that gets purty hot, I'll wait for a spring day when the paint has a better chance of sticking. Why black primer? Would grey work? i already have a can of that."Put your creed in your deed." Emerson
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
Ok I went round and rund with Rustoleum factory reps ( with my past customer) about thier primers. Red, Grey and black.
They have Rusty metal primer, they have industrial and "residential" primer, they have automotive primer ( the black I mentioned) and they have red and grey gen purpose primer for clean metal. All contain varying amounts of fish oil and stuff I don't remember.
The bottom line is the spray bomb, auto type is what ya want.
You can dial down the heat gun , no? The newer wagner have a led at the temp setting, shoot for 900 , not 1100 or 1250. If that dont work, those reealllly rough scotch bright type wheels for an angle grinder wrk great. Flap wheels clog up too fast and eat metal.
I stripped a gate on a horse farm driveway Pickets of 2" sq tube on 4" centers, 6' tall and 16' wide, I used an oxy acetlyne and scrubbie discs..took a week. I used the BEST primer so I'll NEVER ever have to think about doing that again.
Trust me..black , auto type.Spheramid Enterprises Architectural Woodworks
Repairs, Remodeling, Restorations
They kill Prophets, for Profits.
galvy needs an acid prep. White vinegar works fine for me.I never had all that much luck with Krylon spray cans but Rustoleum makes me happy
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
My bad, I thought that was a given.Spheramid Enterprises Architectural Woodworks
Repairs, Remodeling, Restorations
They kill Prophets, for Profits.
which - vinegar or rustoleum?;)
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
Just checked the garage shelf. It's rustoleum, not krylon. But it's also not black, and I didn't use vinegar."Put your creed in your deed." Emerson
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
Most of us learn about the vinegar from bitter experience. Either our own or someone elses.
FE,
Do a google search on "galvanized primer" I still think you need a special primer for galvanized metal and the fact that your present primer is peeling would tend to verify that. Krylon has a primer made for galvanized metal. I am sure that other manufacturers do also.
Bill Koustenis
Advanced Automotive Machine
Waldorf Md
Strip and pickle.
I read the thread and am amazed that no one caught it. The primer you apllied can not adhere to galvanized metal. It all has to come off, then rinse it with white vinegar, let dry and rinse with water. Let dry, then prime and paint. You'll be fine.