No do not use a roller it will look like hell man.
i am not an autobody specialist or anything but if you want to do it right it mst be sprayed on.
lets say you were to roll it on you would have to put like 50 coats on.
just take it to the body shop to get it done.
[10:12pm]«@ [Matt]» he's all up in there like swimwear.