Curt, I preach wearing fresh air systems when spraying catalyzed paints too. Too many bad examples are seen on TV car programs. A canister respirator just doesn't filler isos.
As for the Finishline, whenever I'm asked which gun to buy, I usually suggest them as well. You have to be pretty experienced to see a difference in using a Finishline verses a SATA gun. I have two guns I use the most, well three really. I have a SATA knockoff that is my epoxy gun. But I spray most base and SS paints with my Walcom GEO . . nice gun. I use my real SATA for CC.