There are heat guns available for stripping paint, I have never used one myself. 20 years ago I refinished some kitchen cabinets made from birch with chemical remover and elbow grease (sanding). They came out real nice when finished. I don't think I would do it again though, at least not for birch.
If I did it again I would try the heat gun, the chemicals, rubbber gloves, smell gets old fast.