Dunno mate, call the blaster to know, whe did ours on the ramp, but a friend of mine had his chevy pickup blasted, and they just lifted it on a forklift, luckily it came out way better than expected, had lots and lots of filler on the wheel arches and the bumpers and such, but they where all dents filled up with something crappy, fenders and such all filler, but almost no rustholes, but hey,it was an arizona car, so always have been in the desert i recon

Just call around for prices,it might look like a lot of money, but you cant do it as proper as they can, i blasted my front and rear suspention and driveshaft and such, and i can do it again, becouse the primer wasnt the good one, and thats not the way to roll. Maybe a rotary brush will remove the surface rust and i can coat it again, but its a shame for all the hours i spent on it, and those are just "small" parts, dont want that on your car mate!