Chris
Provides solid rust protection for all exposed metal
This stuff works and in combination with 3M cavity wax for inside bed sides and rocker panels, I hope to keep rust away for many years/decades longer than the factory coatings would alone. The hitch and rear axle on my truck look nearly new after 6 years in the rust belt. I reapply annually in the fall and this leaves a thin, clear/slightly amber wax coating that doesn't wash off. Great on the hitch, rear axle, spare tire, shocks, brackets, sway bars, floor pans, subframes.