I'll probably get blasted for this but here goes nothing. When I was a kid, whenever my dad wanted to refinish a rifle stock he would break a jar and select a shard that matched the curve fairly well. Now this may sound unconventional but I really don't think broken glass is any more dangerous than a table saw or a sharp knife blade. You would be amazed at the ease with which glass will scrape wood and the smoothness of the finish. I am not advocating that you go around smashing bottles, but if you do vacuum up the splintery shards and treat it with the respect you would a VERY sharp knife and wear heavy gloves. I certainly don't suggest this as a primary method but it can help in a pinch.