I just finished making an old shakers style washstand (pine) which originally the wife wanted to put in the kitchen for her plants. Now she wants to put it in the bathroom and use it as a vanity sink . The problem is that I have 4 coats of tung oil on it which I am afraid that in a high moisture environment it will not hold up . my question is : can I apply poly over the top with out messing up the finish
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Replies
Yes, but the poly isn't going to be bulletproof either.
Gretchen is right on. There isn't really anything to make it bullet proof. You would be better off from a water point of view using a phenolic resin varnish and preferably manufactured using tung oil instead of linseed oil. Most "poly" varnishes are basically alkyd resin based, with a bit of added polyurethane resin, almost always using linseed oil. (The only phenolic/tung varnish I know is Waterlox, Behlen Rockhard is phenolic/linseed.
Having written that, it just occurred to me that I should have asked ...Which tung oil? Formby's Tung Oil Finish is varnish already--not phenolic tung oil, but as I understand, Alkyd/Soya. It won't take as much higher end varnish to give you the added protection you want.
In response to your question the tung oil is by minwax and all it said on the can is that it contains "aliphatic hydrocarbons" I even called the company and they said I should be able to , also the pine is old growth southern yellow pine from a old tobacco barn
The Minwas Tung Oil Finish is a mix of oil and varnish, while not very protective against the moisture you have it mind, it will serve just fine under varnish.
just got some waterlox and as soon as it stops raining going to give it a try, hopely before change 33 . thank you and to all that answered my guestions thank you
Waterlox (the original formula) lends well to wipe-on, especially in the case of side panels and whatnot that will not have water standing on them. You just don't want to use it on the insides of panels as it has a tendancy to remain fumy for a long time.
Denny
Minwax Tung Oil Finish contains no real tung oil at all. It's a linseed oil and varnish mixture thinned with mineral spirits.That said, there is no problem applying Waterlox Original Gloss or Satin over it. Apply at least three coats.Howie.........
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