NO!
I bought a decal from Ebay for my P2. Left it on for a few weeks, didn't like it. I mostly see the bottom of my quad, that is where I want color. So I pulled the decal off -or tried to. The quad is covered with dark smudges from the adhesive. I've used rubbing alcohol, Goop, a citrus based remover, etc., and nothing is taking the crap off. It is not sticky - it just looks dirty now and the adhesive removers have dulled the finish as well.
So I've bought a new shell to move it to, but have had so much fun flying the P3P and Solo that I have been ignoring the P2.
Painted my P1 flat grey and tangerine - looks great IMO.
Can't imagine how painting a shell devalues the quad?
Have you ever seen what a hand painted shell goes for on Ebay?