Yeah methanol and isopropyl alcohol again are not safe to drink or inhale, that said they vaporize easily and work well as organic solvents. They are also just flammable as ethanol and butane. That said, ethanol, methanol and ispropyl will work fine for extracts and if used safely and heated without flame to 85 degC pose no problem. Denatured is an umbrella-catch all phrase, and my comments were for
@Slowmo 's specific product.
And if you're in the EU this might be worth a look:
http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2013:049:0055:0061:EN:PDF