Originally Posted by Linctex
I have never heard of this before - - is it mainly for corrosion protection?
It's for any use. It was originally devised for dipping tools to make tool handles, which is does exceedingly well at. I dipped some ratchet handles years ago, the coating is still flexible, still stuck on (hasn't started peeling even a little) and shows no damage despite me throwing the ratchet around on concrete.
It's not really fragile. I have had wheels plastidipped for years, no chips or damage at all to it. In fact it actually works better than paint, I've had painted wheels chip easily, plastidip is thick and flexible enough to absorb impact from chips without breaking.
Yes it does protect the underlying material from corrosion, because it goes on thin (which covers all of the imperfections in the finish) and then the solvent flashes off leaving it as tight as possible on the surface. If you've ever tried to peel plastidip, you'll know what I mean. It peels off as if there's a vacuum under it, that's how tight it is.