Using a wire brush in an angle grinder will get all the debris off (be sure to wear goggles). After that one option would be to use some cans of pickup bed liner spray. There are many more exotic finishes but for a driver that gives good appearance and also sound deadening and some panel protection and it's not messy like the cans of spray undercoating some folks use.

 

By the time I was done cutting all the rusted stuff out there wasn't anything left to clean up!

I like the Master Series paint over POR15. Epoxy primer is another good choice.

 

Wire brush on a drill...........putty knife, and lots of time.

 

Kerosene, LOTS of rags, a very stiff bristle brush, and LOTS of patience.

 

i've heard alot of great things about POR15, can you spray it?

 

For the many good points, there are as many counterpoints. Do a search.

 

So far I've used an angle grinder and a drill with wire brushes to clean, then epoxy primer to protect.

 

I used a por strip from the same makers of POR15. This softens the undercoating and or bubble the paint underneath depending on what there. I then put on a painters suite, goggles, mask, and went to town with an angle grinder and wire brush.

 

sounds like what i will do. Any certain products (such as POR15) you guys recomend for the underside?

 

yes you can spray it, its one part but u will probably want to thin it with some thinner.

I would recommend epoxy primer over por 15 for the underside unless the underside is covered in surface rust. IMO POR 15 should really only be used over rust, in my experience it seems to stick and "harden" more on rust than over paint or clean bare metal. If you have a few spots on the underside that are rusty shoot por 15 over the rusted areas the shoot the whole underside with an epoxy primer