I wipe them down first with MEK, then I use a die grinder with a med grit sanding disc to roughen them some. Then wipe them again with MEK or Acetone. I hung them with coat hangers from the roller rails of my garage doors, I also use twine to make them hang level.
When you spray the bedliner hold the can around a foot away and spray it on in 3-4 light coats. As I said before have a fan ready to blow air on it between coats, especially with the humidity we have now.
How did you handle overspray? just let it fall on the floor or tape off an area for it?
I use a painters drop cloth, but I'm not too worried about getting anything on my garage floor. You can see the floor in the pictures above, it's stained from the water heater leaking before I bought the house.
Love your build. How much lift did you get from the 3 inch springs when you installed the springs? Did you lose any of that height with the addition of the front bumper and winch? Also wondering how level your jeep sat/sits on flat ground.
I wanted front floor liners, but I also wanted a M.O.R.E. dead pedal. So, I just put it on top of the liner and used one long sheet metal screw on the bottom. It's sturdy enough with 3 screws and I will only have to take the bottom one out to wash the liner.