im thinking of taking out my plastic drop in bedliner and putting in the duplicolor diy kit. i found some rust on my bed at the end of my bedliner today. from what i can see thats the only rust i have in my bed but thats just lifting it up. i also have some rust on my rails. so i would do over rails until the body line. should i get some por15 and paint over the rust? or just roll the bedliner on top of the rust? also from what i understand for prep i should sand with 160 grit then use acetone to clean it after sanding then do two coats. any other steps i should take. i would use duplicolor since i can get a kit for about 60 bucks and it sounds like ill like their texture better.