My experience with Tempo (ACS) zinc phosphate and prop paint cans is that the spray cans become useless after one or two uses. I mostly use them every couple of years to paint a small area of prop face repair after filing out nicks. Despite clearing the nozzle (can inverted) after use, I seem to usually find the can won't work the next time I need it.
So I'm thinking of switching to an air brush approach. I'm looking for ideas on buying a decent quality air brush (I have a compressor in the hangar, so I can use shop air), and a source of zinc chromate or zinc phosphate primer (liquid, not spray can), and a source of liquid flat black paint for the prop face (to replace what I currently use, Tempo's "Flat Black Epoxy").
So I'm thinking of switching to an air brush approach. I'm looking for ideas on buying a decent quality air brush (I have a compressor in the hangar, so I can use shop air), and a source of zinc chromate or zinc phosphate primer (liquid, not spray can), and a source of liquid flat black paint for the prop face (to replace what I currently use, Tempo's "Flat Black Epoxy").