Replies

1. 
   Dam_inspector | Apr 16, 2009 02:09pm | #1

   Try super iron out.
   http://www.summitbrands.com/brands/ironout.aspx

2. 
   USAnigel | Apr 16, 2009 03:13pm | #2

   Sanding is about it! As soon as you can! Random orbit 80-100 grit and then seal to maintain the Cedar color.

   In the mean time scrub off the decking to remove what you can of the iron particles.

   Always cover what your working over! But you know that now.

1. 
   Ted W. | Apr 16, 2009 05:51pm | #3

   Sanding will leave light spots, where it removes the natural patina. Could end up having to sand the whole deck, which would be a nightmare. I'd stick with chemicals if possible.

   ~ Ted W ~

   Cheap Tools! - MyToolbox.netMeet me at House & Builder!

   Edited 4/16/2009 10:51 am by Ted W.

3. 
   webted | Apr 16, 2009 07:34pm | #4

   That "SuperIronOut" recommendation should work - it's basically a "buffered" bleach.

   A deck cleaner with oxalic acid in it will work as well. In either case you'll probably have to do the entire deck to keep the coloring even. But, they'll have a nice clean deck to show for your efforts....

   Iron stains come out pretty readily with oxidants, the hard part is not lightening the color of the surrounding wood too much. Try spot treatment first, and if the results are acceptable, work the broad surface all at once.

   Remember that virtually all chemical reactions require heat and time. More heat = less time or less heat = more time. Don't rush things on a cold day, and don't dilly-dally on a hot day.

   -t

1. 
   jimmiedick | Apr 17, 2009 12:55am | #5

   We used a weak solution of an oxalic acid this afternoon, and had great results.  I thought it would work, but was surprised at how well it cleaned, and how quickly.

   We have been using a lot of composite decking, and never considered the effect it would have on the cedar.  We are reminded and chastened now.

   Jim

4. 
   Biff_Loman | Apr 17, 2009 05:04am | #6

   Oh, I learned about this the hard way. Long story short: had to sand down a whole deck after cutting a bunch of steel bolts in such a way that particles landed on the cedar.

   Sure, I get paid by the hour, but the boss was not impressed.

   Now I know.