On Sat, 4 Feb 2012 17:08:20 +0000 (UTC), Chuck Banshee wrote:

Ooops. I don't know the difference between varnish & lacquer.

Lacquer dries solely by the evaporation of its solvent. No chemical change
takes place. When dry, it can be removed with its original solvent

When varnish dries and cures, it combines with oxygen from the air and a
chemical change takes place. Because of this chemical change, its original
solvent will not remove it.

When you hear that piles of oil soaked rags will spontaneously combust,
they are not talking about motor oil. They are talking about oils used in
varnishes and oil based paints (linseed oil, etc.) that combine with oxygen
(oxidize) producing an exothermic chemical reaction as they cure.