didnt sand the pebbled surface parts. just lightly sanded the smooth stuff with 1000 grit wet-or-dry and then washed them off.
Washed all of the parts with engine degreaser to get off the stupid armorall that was put on there from the dealer(bought used), and then washed with dawn and warm water. air dried with an air compressor, let them warm in the sun and then sprayed.