Spoke to a paint supplier this afternoon and asked about acrylic lacquer and the first thing he said was "Why would you want to use that, you'd be better using two pack"

When I asked about the requirements for a booth, PPE etc, for two-pack he said, "Nah mate, you just need a carbon-activated respirator, you can spray it outside"

Maybe I'll try another supplier........

Definitely find another supplier if they can't/won't sell you what you want