POR 15 breaks down with direct sunlight. Maybe try a black epoxy with black chip guard if you have gravel issues................

 

Mmmmm... their site say Blackcoat and Chassis Coat topcoats are UV stabilized.

 

No matter what you use the leading edge will get blasted. Best thing you can do is put on a pair of clip on mud flaps.

 

Based on an episode of Mythbusters I saw, I would look into using spray on bedliner.

 

You know invade you run over an IED....

 

por 15 will probably peel right off aluiminum even clean smooth metal, there has to be some corrosion present

 

I work for Line-X and for the spray-on bed liner to work you would need about mils or it will chip off like paint. A epoxy will chip off eventually on need to be re coated every once in a while. A lot of our dealers spray the skid plates on jeeps and Line-X holds up really well if sprayed thick enough.

 

Thx for the tips, not interested in bed liner as it would be really thick and uneven, not the look I want. Was hoping the POR Topcoat would be more durable than paint, but still look reasonably good as a smooth finish.