Randolph used to make rejuvenator when I was covering full scale stuff. I'm not sure just what makes it rejuvenate, Ty is probably right, he's done it before. Also, I use a product called lacquer melt on old, cracked finish guitars in an effort to try and keep from stripping them. It works well. Now, is it fuel proof? Dunno, would be a bit skeptical about it without trying it on a scrap first. Plus, a little goes a REALLY, REALLY long way!!!!!!!!!