Just got home from spraying two coats of 2K sealer on a used bumper for a 2000 Jeep Grand Cherokee. Plenty of earlier work prepping.
Tiny DeWalt gravity feed touch up gun from Lowes I got as a package ( two guns) buy through friends that work the end cap presentations / planograms over night.
It's barely adequate but actually did a decent job because of the outside air temp.....and cleaning it.