I've probably mentioned this before, but for the "non-professional" painters out there, you should be extremely cautious around enamel paint "hardeners". Most of them are some variety or another of "cyano-acrylate" compounds. "Cyano"- - - - -yep, CYANIDE! It's a contact poison, which means it can be absorbed through skin exposure. Even if you wear a really good activated charcoal respirator, you should wear a plastic lined disposable paper "shoot suit", gloves, and booties. Use a masking tape wrap to seal sleeves to gloves. No exposed skin whatsoever. Some of my friends who painted with hardener in acrylic enamel for years now have nerve damage that makes them feel like they have bugs crawling under their skin 24/7! Hardeners are great, but their chemical compound demands extreme safety measures while using them! Oldtime gunsmiths got similar nerve damage from hot salts gun bluing procedures that also used chemicals containing cyanide compounds.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!