The story they gave me was that if I bought it off of a truck I had to go to the truck to get warranty. Otherwise, it was assumed that I bought from snapon directly and those tools were subject to a limited warranty (not lifetime) and since I could not provide proof of purchase, that was the end...
Re: best penaetrating spray
Acetone is not known to be terribly toxic unless you ingest it. It's not classified as a carcinogen.
It will dry out your skin though.