Spraying my inner fenders with Raptor Liner. I'm using my Harbor Freight HVLP drilled to 2mm. 35-40psi. Raptor is mixed slightly slower and a little thinner. Very happy with the results.
EDIT:
A viewer pointed out that I did not record mixing the hardener. After rewatching, that's absolutely true. Though I didn't film it, it is mixed 3:1, with some reducer.