aluminum oxide is rated [ high] for metal removal. i would not recomend it. i use plastic media here and starblast for rusty frames and floors. you can go to [url]www.nortonsandblastingequipment.com and see all the blast product ratings. if the co thats going to do it does'nt specialise in restorations i would pass. aluminum oxide is very harsh. i did a frame with it and pitted it bad.