If you have exposed studs you need to protect put a dab--that's a precise measurement--of wheel bearing grease on the threads. Bedliner might harden around it, but the grease will protect the threads. If you need to chase threads and can't get a die on the stud use a stainless steel nut. You might have to cut an X on the nut with a Dremle tool if the threads are burred on top. You can do the same thing with a SS bolt if a tap instead of a tap.
Paved roads are prime examples of government over spending!