I guess this "dustless" blasting is the newest rage for stripping cars since we have several new companies showing up doing it. I've never had to deal with one done this way before but I now have a customers car that was stripped this way. From what I understand they mix water with the sand while blasting but they put some type of chemical in it to keep it from rusting right away. I guess they also spray the car down with the same chemical after they are done. My questain is do I need to treat the metal with anything before I start priming? The blaster said just hit it with a scuff pad and I'm good to go but not sure I trust him, especially with a high end paint job I'll be responsible for if it fails. If nothing else it sure leaves a mess, there is sand stuck in every crevices, going to take a lot of time cleaning it out or take a chance of it blowing out somewhere while painting. Not sure I'm sold on this way of stripping.