For sandblasting large areas, you might consider renting an industrial compressor from a tool rental company. you can get a lot of sand, and get it all done in one day. I have done this on several occasions in the past, it is worth it if you are in a hurry.

(By industrial compressor, I mean one that is "trailer mounted", like for a jack hammer or other industrial applications. This = no stopping and waiting for air.

Yeah that is what I was talking about. I am not in that big a hurry though. Just found out I wont be working for the rest of the week so I will take my time. I thought I got about all the rust in the floor area but I found differently so far. Looks like I have a few more patch panels to make. Course I havent even got to the body of the car yet who knows what the previous owner covered up.