I've used PlastiDip, but only on the dash of my bike, and no issues, though I haven't used a powerwash on it. The only issue I had was where the bolts went through. As I tightened the bolts, they pulled the PlastiDip off around where the bolt goes through, and I had a small spot that developed a bubble that tore a small spot in it, as well. I could just spray over it, but just haven't done it. I mostly sprayed it on to block the reflective glare I got every time I turned a corner near my house, when the sun would glance off the chrome. That has been resolved with the PlastiDip! And, I like the fact that if I WANT to go back to the chrome, like if I were to sell the bike, I could just peel it back off, and nobody would be the wiser, since no "scuffing" of the chrome was required.
Looks like the PO of my truck didn't use it, though. Seems like he just used flat black paint, but it seems to be peeling back off where I want to expose some of the chrome on some emblems, so maybe he did. It takes a bit more effort to get it off, though, so I think it's just paint. There are some spots that are thin or missing paint, so I may just PlastiDip them again to cover that up.