Very simple. A power washer, steel brush to get the loose stuff off and any can of flat black rust paint. I keep up with mine so it's even less work. I give it a quick touchup of paint every spring. Excuse the white stuff (salt) but I did that earlier this spring just after they had salted the roads again after a late season snow fall.
2016 XLT/Sport/FX4 Supercrew 5.0 3.55 EL
Bak Revolver X2, 285 65 20 BFG KO2's with 2" level, OEM hood deflector, Line-X, Hypertech Speedo calibrator, Husky X Act floor mats, Ford wheel well liners, 20% tint, EZ Oil Drain Valve, Dee Zee tailgate assist.