I'm starting on the bodywork of my Impala. So far I have taken off whats left of the remaining chrome side pieces and removed the clips etc.. I ran up to the Auto Parts Store at lunch and was checking out the tools as in sanding blocks, body filler, dent puller etc. The dent puller looked like it was cheaply made. It looked like it might work on the smaller dents but I have a large dent in the driver side door. Probably needs a new door but I would like to make due with the one I have. For this large dent would I be better off removing the door panel and trying to knock it out from the inside or a combination of both? Is there a better dent puller that I should be looking at? What type of spray gun should I look at for shooting primer? Gravity feed vs bottom cup?