So you can spray the POR 15?
You can, but yes, a air supplied respirator is recommended. Outside in a stiff breeze might be fairly safe. It doesn't kill you quick, takes a while.
My motor doesn't have a lot of smooth steel parts left... Front cover is chome, manifold is alluminum, oil pan is anodized, etc...
When I first did it, I had Dart iron eagle heads and painted those also. The ends of these heads are machined smooth, and the brush strokes made me nutso.
My new AFR heads are alluminum, no problem there.
and the brush strokes don't show on the rough cast iron. Stuff if tough as nails, it's been 4 years, motor's been out and apart twice since I smeared it on. Stuff still looks like the day it was applied. Color is a lil different than spray bomb chevy orange.
If I had a factory oil pan, front cover, and valve covers, I'd consider spraying the por (out in the driveway on a windy day!) but would also consider other solutions.
also worth noting that por doesn't stick to smooth steel for nuttin. It likes a surface with some bite. hit that oil pan HARD with a coarse wire brush. Or consider another solution.