I've used the fairly cheap Badger basic airbrush with Precision Paints etch primer for an Allchin TE and a 5" Simplex. I also use it for normal enamels. I've not noticed any discernable effect from the etch primer and I'd probably use it with my more expensive DeVilbiss airbrush if need be.

Thorough cleaning after use is obviously needed.

Edited By Clive Brown 1 on 04/06/2018 14:56:20

I paint quite a lot of alluminium castings mainly plaques & signs etc and also my models brass alloy steel etc, I'm fanatical about cleaning my brushes sprayguns & airbrushes, & I prime with ICI acid etch primer [don't think it's available any more] but I allways brush it on as it's thin & doesn't leave brush marks or runs, you can't tell if it's brushed or sprayed, my brush is immediately washed out in cellulose thinners, I use celly thinners for cleaning house painting brushes as well much superior to white spirit.

Hmmn 2 pack acid etch primer from an aerosol Neil?

Graham.

Would something like this work?

It would seem a relatively simple job to make one starting with a blow gun.