Dear Peter,
I often read about woodworkers recommending different combinations of finishes. How does one know which finishes are compatible, and how does one know in what order to apply finishes that are compatible?
Are there any rules that one can apply in choosing a combination aside from the obvious characterists associiated with individual finishes.
Thank you, Ted
Replies
Ted,
I'm assuming by combinations you mean something like 13 of this and 13 of that. If not correct me.
Finishing is made unduly complicated by all the recipes and myths. I guess there is a personal pride in stating that you "made the finish" The question I always ask is why. More often the not the answer is "somebody once told me........."
The best advice I can give you is to pick up a couple of the books on finishing. They will go into detail on each coating such as shellac, lacquer, oil varnishes etc.
If you could be a little more specific on combinations you might be talking about ,we'll tackle it. Otherwise I could end up writing volumes here.
Very good question. Get back to me.
Peter
Or, Ted, do you mean a combination as in wax over shellac over oil?
Joe
Peter and Joe, yes, I meant applying one kind of finish over the other like a wax over a varnish over a shellac, or a shellac over an oil or visa versa.
Ted
Ted,
Sorry for the delay.
Shellac can be used over an oil . Say you rub a coat of any type of thin oil such as watco, minwax etc. to accentuate the wood. After it is dried, you can then put a brushing varnish or shellac if you prefer.
If you apply the oil thinly (just enough to color the wood) you can comfortably put finish coats after a day. If you use oil in a generous amount, the longer you can wait the better IE a few days to a week before re-coating.
Sealing an oil in to me is always a good idea and I would use shellac for this. When used as a sealer, use dewaxed shellac (SealCoat) that way you can put a varnish or urethane on without adhesion problems. Be sure and scuff sand and clean prior to top coating.
Shellac is a great finish by itself and will produce a glow that most finishes can't touch.
Wax can be used as a final touch on any type of finsh. Just be sure to let the finish cure well before applying wax. I have an article on wax in this months FWW that will explain it in detail. I can't say I use wax on every project but I do but I have a number of side tables that I've done shellac and wax finishes on and invariably when I have company those are the pieces friends seem to run their hands over.
If I didn't hit a specific note here get back to me and we'll zero in it.
Peter
Thanks Peter, your explanation is very helpful as well as your recent articles and videos. Thanks again, Ted
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