I think I have already decided the Rustolium is cr@polium. It does not seem to be curing. It is soft and easily scratched. I think I used Plasticote on a car project once. That seemed to dry hard and scratch resistant in less than an hour. I guess I'm off to the LHS to get the LusterKote primer.
Giant Scale, I pooped out before I got to the end of your post. How would I ever use your process to actually paint a part. I guess I could check my reflection right next to the black ink marks I use to check C.G. Just poking fun

Really though, this airplane will probably get 10-15 flights per week. and will undoubtedly endure the rigors of my sloppy landings.
I just want a reasonable color match and the paint to STAY ON the cowling. Oh yea, unlike last time, masking tape should not pull the paint off.