HOLD ON. One who paints should know to NEVER Sand Blast a Panel. sandblasting is to harsh and distorts the metal. Use only Bead Blasting It will take the paint and clean but not distort the metal. If you take a flat Aluminum panel and Sand Blast it will WARP. Cheers Larry B. KD6WI User of the Apache, Mohawk, SB-10 And soon to be on the air the WARRIOR.