Finally got the seats, rubber floor and plywood up. Floor looks good minimal rust with the normal numerous screw holes. I plan on caulking the holes and covering with aluminum tape. Insulation board, moisture barrier and 1/2 inch plywood covered with vinyl plank flooring. My question is what do I paint the floor with prior to insulating and do I need an additional rust preventative prior to painting? If anyone sees something wrong with my plans please share.