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I had a piece of unfinished birch that got a few spots of water on the surface and subsequently left white colored spots on the wood. I sanded the surface after it dried and the spot appeared removed. Then I applied one coat of clear polyurathane gel wipe-on finish. Now the spots have appeared when the surface is looked at in right light. Any suggestions on how to correct this?
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Replies
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Sounds like a job for sandpaper, unfortunately.
*Thanks for your reply CStanford. My main concern is that I thought I had already sanded them out once, but they showed up anyway. Is there any way to make sure I've got them out before I put a coat of poly back on after I sand the first coat off?
*Wipe the bare, sanded surface with mineral spirits. If they still show up, keep sanding.
*Steve, maybe I'm not fully understanding the problem, but from what you say I think the spot is in the finish, not the wood. If the water spots were still in the wood I wouldn't expect the discoloration to be white. White rings for example are a common problem, caused by moisture getting under the finish where a wet glass or hot cup was placed. These can be effectively removed with an oily substance like petroleum jelly or mayonaise, denatured alcohol or a mild abrassive like cigar ashes mixed with oil. Try alcohol on the spots. If this doen't help, start sanding with very fine paper, 400-600 grit. Then try the alcohol again. If you find that you can remove the spot this way you may be able to repair the finish without having to strip the finish down to bare wood. Good luck
*Clay, The water got on the bare wood before the first coat was applied. It caused light colored spots on the bare wood and also raised the grain a little in those areas. Thanks.
*Steve, I was just wondering something. Your original post was on 4/9; it's been almost two weeks so can you tell us how you fixed your problem and did it work? TIA
*Remember reading in a finishing book that when just built furniture was being delivered during a rain shower to a finishing shop they would immediately wipe the entire surface with damp rags so that all of the wood was uniformly wetted. Otherwise the wood developed water spotting as you describe.
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