Why not go to the local auto parts store and use what they sell and recommend? Or stop by an auto body shop and see what they use?
Charcoal respirators aren't good enough with Isocyanates. You need supplied air, the tangle of hoses is a PIA. A chink copy of a Sata gravity feed gun is a good place to start.
Regular Rustoleum enamel thinned with Acetone sprays just like the $400/gal PPG Delfleet ESSS I am painting a set of Clamar floats with if the humidity drops some the next couple days.
