I have numerous small dents on my cab roof including an "oil can" spot. I am semi skilled with a hammer and dolly but don't know if I want to tackle this job, to me it looks like the entire back half of the cab roof will need body fill. Will I regret even starting, should I leave it or take it to a bodyshop? It was cleaned to bare metal and then sprayed with epoxy primer. That is another question bond over the primer or back to bare metal?