I haven’t seen any discussion of the advisability of removing parting agent from the plastic before painting. That used to be desirable.
Plain scrubbing with a little dish detergent in water, then thorough rinsing, used to get the job done. If you’re not going to use something like etching primer, I’d bet the cleaning would be a good ‘zeroth step’.
Over the past 18 years, I have used hobby paint brushes and Pollyscale paints to paint over 100 Walthers structures, inlcuding buildings, bridges and modulars. I have never used primers, and I have never washed the plastic pieces beforehand. Not a single one of these structures shows any sign of peeling or any other paint flaw.
Rich
So I guess that I haven’t been doing it wrong all these years either. Maybe we should consult with “spike”. [}:)]
Joe
Never felt the need either or suffered any ill effects for not. Perhaps changes in the manufacturing process, chemical composition of the agents in question, or the qualities of the paint have some influence.