A primer of a question

While studying a new model I just bought, the thought occurred to me - what if I wash all the parts while still on the trees and then after they dry spray them with primer.

Anyone every try that and how did it turn out?

I would not becuase…
You will have to scrape the primer off before you glue (if you want good plastic to plastic adhesion)
You will have to re-prime some sections after assembly and putty (to see imperfections)