@Nundrum Cheers. I don't like the way solvent based paints look. The effect is entirely unnatural. The goal is always to make it look real/organic, like this happened naturally over time. Tearing down enough old worn out shit, I realised the only way to duplicate the layers that time built up, is to build them up myself. I kinda stumbled on the primer. I was using it for a few pieces that I knew would have bonding issues. Plastics that did not paint very well, or things that my get touched a lot, or both. self etching primer works very well, on certain plastics, not so much different than regular paint on others. The primer was a winner. Just so happened I needed to do washed on some areas primed... My normal process was to use a 200-280 grit sand paper on it to prep it. Put an acrylic was down as the base, and work kinda fast with a dryer so that it set quick. Then coat with dead flat, a lot. Took longer, had a relatively high unsatisfactory rate, and made me nervous because I don't know how it will age. This newer method (5yrs now) is the goto and has worked on every plastic I've tried, and it needs no sanding prep. I do clean it well though, but that's kind of obvious.