plasti-dip is sh!t mate, have used it on more than one occasion
you think its looks good on the internet but trust me in real life its doesnt look all that, looks tacky
i plasti-dipped my burger badges and it didnt last two weeks, for plasti-dip to be properly stone chip resistant and weather resistant you need plasti-dip primer, and plasti-dip, and it aint that cheap anyway, so you might as well get them proper painted
it does self level though so the finish should be ok...
have done on my badges, roof, mirrors and interior parts, everytime extremely disappointed