I own many CMP planes and have never had any problems with the durability of the covering. I know some like to glass to add details, but for those who have never had a CMP plane I don't think you have to worry. I have even repainted my CMP Hellcat with great results. I just sprayed over the whole thing with Minwax polyurethane and it has been holding up great.

I plan on adding some color (maybe some yellow here and there) and will spray over it with the polyurethane.