I WASH MY TRUCK EVERY SAT MORNING.IN A DIRTY ENV.WHEN I GET IN TRUCK,DIRT MARKS ON BOARD.CANT GENT THEM CLEAN.
During your next wash, scrub the running boards with
Tire & Rubber Cleaner using a small, stiff brush. Rinse them off. If the dirt marks are still there, give them another scrub. It may take some effort to get the dirt out of the pores. Rinse well and dry.
Working in the shade, dress the running boards with
Ceramic Boost. Apply a heavy, wet coat, letting it soak in. After 5 minutes, dry off any excess. Having the semi-porous material on the running boards protected with the
Ceramic Boost will help keep dirt from working into the finish, making cleanup easier during your next wash.
Same process above can also be used on spray-in bedliners.