I've literally just done my rear arch and it's come up mint! I sanded it down with 1200 sandpaper making it smooth and made sure I got all the rust off then left some rush treatment on it for half hour, cleaned it off, panel wiped it down then set to primering it then gloss. Just had to sand down the over spray with 2000 wet and dry. Finished with a good polish and you would never know!! Brendon