I purchased a set of decals for a mathieson chemical tank car last year. Recently I got a ush model from a fella back east. The car was tarnished, but I decided to use bar keepers friend. That, a cloth and some elbow grease cleaned it up. Tonight I applied the top coat. Varying the psi I avoided a major masking job. The underbody (non remove able ) will be black as well as the dome and grates. I will hand brush and airbrush them.
enjoy