Finished prepping the skins, used an orbital sander and attached some scotch bright pad to it and scuffed up the inside surface. Removed all "scratches" on the inside of the skins also. Shot the primer, still learning, I need to apply more on the first "tack" coat in a smaller pattern. I seemed to be wasting a lot of it before I figured this out again and that primer is way to expensive to be wasting.