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can you tell me what I did wrong

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Forum topic by woodnut posted 03-31-2010 02:37 AM 1034 views 0 times favorited 9 replies Add to Favorites Watch
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woodnut

393 posts in 3516 days


03-31-2010 02:37 AM

Last night I put the first coat of poly on a cabinet for doll clothes. ( my nieces b-day is coming up) So tonight I go down and wet sand and then start to apply the second coat. All was going good and then I see a ripple in the wet poly so I rubbed it with my finger thinking something had fallen in the finish. Boy was I wrong, with the wipe of my finger I peeled off the first layer of poly. This was only in two spots not the entire piece. I had the shop at 72 degrees, but did turn the heat off when I left.The poly is no more than a month old. So I don’t know what went wrong. This is the first time I have had this happen so if anyone can help me I really would appreciate it. Sure don’t want to go though this again.

-- F.Little


9 replies so far

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Mark

1801 posts in 2738 days


#1 posted 03-31-2010 02:41 AM

did any other oil of any kind happen to get to your project before you finished it?

-- M.K.

View a1Jim's profile

a1Jim

115202 posts in 3041 days


#2 posted 03-31-2010 02:47 AM

Hey Woodnut
If you put oil base poly on right after wet sanding it sounds like you did not let the water dry out or you had contamination on your sandpaper.

-- http://artisticwoodstudio.com Custom furniture

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woodnut

393 posts in 3516 days


#3 posted 03-31-2010 03:04 AM

Mark- No I did not have any type of oil around the finishing area, but good thought. Thanks

a1Jim- Now you could be onto something, I did let the poly get the white powdery tone to it and then jumped right in and started with the second coat. It was still alittle cool in the shop so I am guessing you are right, but I didn’t know that would cause the first coat to peel off.

-- F.Little

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a1Jim

115202 posts in 3041 days


#4 posted 03-31-2010 03:10 AM

When you trap water between two coats of oil finish it will try and escape the easiest point of resistance ,in this case the first coat that had been sanded weakening its seal and letting the water get under it.

-- http://artisticwoodstudio.com Custom furniture

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woodnut

393 posts in 3516 days


#5 posted 03-31-2010 03:17 AM

Thanks for your help. Thats what I get for being in a hurry. If I have to make mistakes aleast I can come on here and find out what I did, it is one thing to mess up, but pretty bad when you don’t know what you have done.

-- F.Little

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a1Jim

115202 posts in 3041 days


#6 posted 03-31-2010 06:29 AM

glad to help

-- http://artisticwoodstudio.com Custom furniture

View Andrew's profile

Andrew

709 posts in 2663 days


#7 posted 03-31-2010 12:01 PM

yeah, hurry, you cant hurry a finish. With all the hard work invested in a project, its the last thing you do and the most critical by the time you start it.
Anyway, I prefer shellac, but use poly a lot, I don’t sand until I have 3 coats on, then a slightly mineral spirits thinned down coat, then just a buff.
Thinning, will make it so there are less brush marks left behind, and it dries faster.

-- Even a broken clock is right twice a day, unless, it moves at half speed like ....-As the Saw Turns

View Bill White's profile

Bill White

4454 posts in 3425 days


#8 posted 04-03-2010 07:55 PM

If you’re building a heirloom piece, why not try an heirloom finish? Maybe a wiping varnish, a shellac finish, BLO then varnish. I try to avoid poly at all costs. Just my not-so-humble opinion, but I think the stuff looks too “plastic” for fine projects.
Bill

-- bill@magraphics.us

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woodnut

393 posts in 3516 days


#9 posted 04-04-2010 03:38 AM

Bill this is a chest for doll clothes for a 9 year old girl. I love shellac and use it alot, but doubt that it would hold up to the punishment.

-- F.Little

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