I use craft acrylics (FolkArt, Apple Barrel, Anita's etc) almost exclusively an am quite happy with them. Sometimes I prime and sometimes not - I do when I anticipate a lot of masking though I don't think it necessary. Adhesion can be a problem but I always add GAC 200 when thinning (helps adhesion) and I thin with 1) Future, 2) airbrush medium, 3)windshield wiper fluid or 4) very infrequently just plain water. I clean the AB with Windex or Purple Power and spray water as a final step. If I end up with dry paint in the cup I use acetone or lacquer thinner on a rag to wipe it off. I usually do a thorough AB clean after each painting session. Some craft colors can be an exact match for our model needs but generally not so mixing to match can be a bain to some or, like me, another aspect of the hobby. The only craft 'color' that I haven't found is silver so I use Alclad when I need silver.