The other thing to know about stripper is that from the moment you apply it, it starts drying out, and as it dries out it gets less and less effective. The key then becomes getting the old finish liquefied before your stripper has lost its power. The way to do that is to cover it on the surface to keep the air from drying it out. This is what the Peel-Away people did with their stripper kits which contained a good (but not exceptional) stripper and plastic sheeting to cover it with. You brush it on, cover it and leave it to work over a longer time period, without worrying about it hardening into a mess. Naturally, your stripper and plastic sheeting have to get along without melting the sheet, but some strippers (like Citristrip) even come in a plastic jug. That's a pretty good sign that you can use it, but do a small test first.