Abrasive blasting media

From what I know "sand" is not really the preferred "sandblasting" media. I use glass bead for the blasting cabinet but you can other use alternatives like walnut shells or soda blasting. The soda is good because you can just wash it off (I think). I think that in some cases sand can actually heat and warp sheet metal. Disclaimer: I'm not an expert.
if you use soda watch getting it in seams where 2 metel over lap like where door skins trunk skins come together if you don't get it all out and it gets wet it can swell and in some cases rip the metel apart so be careful