Have to hear back from mirror coat, but Smith's cotains toluene and xylene, nasty stuff, and their tech said it does give off gases while curing as does environtex until dry according to their tech.
Don't know what the health affects are from the gases, if any, but my main cocern is for my Grankids.
Being RF9's set up is enclosed ,and dust is not a problem, you could prolly add a low volume exhaust fan and vent outside.
Thats what makes this such a great hobby, ya just keep learnin.
