After you have a car sand blasted, it's back at your shop, you have blown all the sand out of her, what's the next step?
I talked to one guy and he said "blow the body off 100% and hit it with DP40", do your body work and everything right over that.

Another guy said after you blow the car off, acid etch the entire shell, hit it with a water hose, when it dries it will be orangeish, and hit it with DP90.

What's the correct way, I don't want any problems..... Thanks