Hey guys, since I'm new to modifications on vehicles, I don't really feel to comfortable with all the electricity parts... I would like to put por15 over my frame, and bed liner on my tub, but if grounds need to be on bare metal, where would I connect them to? Would I have to sand down the tub or frame to bare metal in some places to put the ground in? Also, ignoring what I put over the metal, where is the best place to attach a ground to? The frame? Thanks!