I have some custom oak shelves finished with laquer. Overall I’m happy, but the effect of the laquer is so subtle that it appears a hair too unfinished. It also easily collects dust in crevices; I’m not sure if that can be helped.
Would there be harm or benefit in applying anything over the laquer, like tung or linseed oil — or anything else — that can penetrate the wood’s fibers and bring more life to the oak and offer added protection? I’m not looking to strip the laquer at this point so maybe I’m out of luck.
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I think oil is likely to prove unsatisfactory. As a film forming finish, the lacquer will impede the absorption of oil by the wood and you might end up with a blotchy appearance. I suggest you either apply more lacquer yourself, or shellac.
Definitely not an oil. More lacquer or shellac. Or relaxed shellac, then a varnish or poly if you wanted more protection.
Thank you. I'm going to wait a bit and see if I get used to it. The lacquer was sprayed on and I would be slightly more comfortable brushing, but I'm still a little nervous about adding another coat and changing the color. But it may come to that.
Good advice above. Lacquer is one of those finishes where a new application will dissolve into the existing coats. Brushing new coats over existing can quickly become a mess. While there are "brushing" lacquers available, unless you have experience using them, I would advise that you apply any new coats with spray cans. If you have a lot of surface area to do, it might get expensive. In that case, hire someone with a spray gun do it. Sand lightly between coats with 220 grit paper.
As stated above, if you want to add a somewhat more protective coating like polyurethane, apply a coat of de-waxed shellac (Zinsser Seal Coat) first. Otherwise, you might have adhesion problems. As with lacquer, for small areas, spray cans work best.
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