Picked up a pair of Lester mags that will reside on a 1974 R90/6 next summer. They have lived a variety of lives if you count the layers of paint, very good condition physically, just never lived with anyone who knew how to prep before painting! I am going to have them sand blasted and then powder coated black as they were originally. Do the wheel bearings need to be removed prior to this work? My blaster is good and careful about masking before sand blasting, I was just worried about the heat process. If removed can they be re-used?