I use KG Industries Gun Kote exclusively in my shop. You have to prep you parts correctly though. I'm not sure about the Brownells products, but with Gun Kote the parts have to be cleaned (degreased) blasted with aluminum oxide (120 grit) heated, phos-coated (spray on liquid phosphate coat), heated again then your color of choice applied. Once a nice uniform coverage is achieved you stick it in the 'oven' at 350 degrees for an hour. I've done a lot of firearms and they have held up great. Keep in mind any paint job is only as good as the prep work. You need to use a quality airbrush and don't cut corners otherwise you will be disappointed in the final results.