a buddy of mine in college just cleaned his really well and hit it with some matte black krylon. he had a 2 dr tahoe that showed frame really bad. anyway, it looked great when he was finished, only took him a few hours or so. good option in my mind, especially for a street driven truck.

 

POR15 actually makes a product that is Non UV sensitive unlike the rust preventive paint. Its called Blakcote.
I worship POR15, the stuff is amazing!