Originally Posted by BillDeShivs
Glass bead blasting removes metal.
Aluminum oxide blasting removes metal more aggressively.
depends on how aggresive you go. lower air pressure and keeping the blast nozzle futher away will just etch the metal. i usually do mine at about 10-20 psi on the air pressure and keep the nozzle at least 6" or further away. have had good luck with this method.