Light body work/painting in a garage???

[akpackfan]

'71 C10. Want to strip surface rust with a grinder and apply what it takes to stop it from coming back. All I have is a tiny compressor and no "spray" equipment. I know I need to neutralize the rust left in the pits of the metal after grinding with a "metal prep" type of product from PPG or another maker then cover with an enamel primer from a can. Can an inexpensive spray gun be used to do this? I've never done any car painting or real spray painting so I don't really know the process of doing it right. Anyone have advice for an amatuer or suggestions on equipment or paint/primer products to stop the rust?