I used Herculiner for the floor in my XJ after I fought the small rust patches. Its been done since August and still looks new even after winter abuse and hauling parts. To clean it, I removed the big 3" OEM plugs in the very front corner of each floorboard and replaced them with 3" pipe test plugs from Home Depot; just remove the plugs, rinse the interior down, spray with purple power, scrub with tire brush, and rinse.