I'm getting my 65 C-10 LB painted soon and before I do I'm wondering if anybody has ideas on what to do underneath. This truck has only 64k dry Kansas miles and now its sitting in a humid Detroit area garage. Although I tarped over the cement floor and got a dehumidifier in there, the clean, wheat-polished underbelly is already gathering that nasty orangy surface rust just sittin. It's gonna be a fair wheather driver, but I want it to last. So do I sand and undercoat? Sandnpaint? Sand and do that "rustconverter" stuff and then paint? I was even thinking about that bedliner stuff in the front fenders and cab corners.
If it's just light surface rust, I'd use POR15. It will seal it and prevent the rust from spreading any further. After that I'd do a Rino-liner or other roll-on bed lining product through out the fenderwells and the rocker areas. The bed-liner in those areas will prevent rocks and other road debris from chipping out the paint and giving rust a foot hold. DValentine
I replaced my inner fenders with some factory pieces I found that were in great shape -- had them sandblasted then covered the undersides with the liquid bedliner. Many miles of gravel road later they are holding up great.