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Building a red oak step stool, I clamped it during glue up. After removing the clamps
I found oil stains where the protective plastic pads had been. I'm not a total rookie
I've used all kinds of clamps for many years yet never had this problem. The stains
appeared under two different kinds of clamps, one set probably 25 years old and the
other set was new - which left bigger stains. I'm dismayed looking at it, wondering if
it will show through my intended finish of wipe on Poly. Perhaps I should finish with
tung oil to blend with the stains. Any advice? Perhaps its best to remove the plastic
pads totally and rely on wooden blocks as pads.
To my surprise the stains sanded out!! I got the project assembled and ready to
finish, perhaps later tonight. I appreciate the advice from both - all good ideas.
Whenever I build the next one I'll use poplar - this one turned out so heavy my little
grand-daughter won't be able to budge it.
I just realized that over the weekend I thew away what might have been just what I
need to cover my clamps. Something came packaged in a box of clear plastic
instead of cardboard. I could have cutout squares and use spray adhesive to attach
if stains are not to deep maybe sanding will work. you might bleach the wood I tried downloading an article on bleaching wood but might have been to large got an error on it send your email to email@example.com and I will send it to you. If stain is to dark a clear finish may not cover it. try putting same plastic on scrap piece and put finish on it to see what will look like. woodchuck1950
I've had a similar problem with new wooden handscrews—light sanding has always solved the problem. Let the surface dry and then sand. Your idea to apply a coat of oil finish should also work. Once the coat of oil is dry, you can proceed with the wipe-on poly finish.
Why don't you try wiping some poly over one of the stains. If the stain disappears, your problem is solved. If the stain shows, remove the poly (before it dries) with mineral spirits. Sand lightly and then apply a coat of oil finish, followed by coats of wipe-on poly. I hope this helps. Tim