not sure what its called, but its the stone chip stuff you mean ? you put that on, then the paint goes over the top in came color as the car
probably best to get a pro to do it, although all depends like said how good you are, and how nice/not nice the car is, if your not good and the car is nice-call in a pro
funnily enough ive just got back from dropping my car off to have both sills and the rear valance painted, were nice enough but cple small bubbles and wanted to nip it in the bud, also the jacking lip along the bottom was a bit flakey, and also along egdes of the valance where mud flaps were on, and also 4x wing mirrors being painted- its going to all come back like new, cant wait

, had the front valance and is lip painted a few months ago, so shes gonna look lovely , hopefully pick it up wednesday