Good warning to tyros but old news. Yeah, boiled somehow means heavy metal driers have been added, usually. Behlen and Sutherland Welles do only use heat, however and that is more accurately known as polymerised. Ditto for Tried and True which is 50/50 polymerised Linseed and beeswax which I have commented on before. Great stuff. Quick disposal of rages is in a water-filled baggie. The landfill is on fire anyway.LOL! Polyurethane? Not on my work! Can't fix it, can't remove it and looks like plastic. Not gonna dine or let your kids fingerpaint on your speakers, are you? Another however, however. Minwax brand wiping poly is close to the sheen of varnish. Not as plasticky. I did a white oak table top with it a while back and looked good. Needed the protection. Client was going to fingerpaint on it.