Tim,
I used the plastidip stuff, masked off the bushes, nicely cleaned WBs treated to a good dose of 400 grit paper to give a good key, the grey primer followed by a fair few coats of the rubber paint (you need to paint as the primer is just dry!).
You can thin it and spray paint it as well (did the roll cage) but you need to build up a good few layers to make it effective.
I really rate the stuff on the suspension, no chips in 2 years and no sign of rusting.
Jon