Preval paint system??

I relocated to s e Tx and have a car I picked out that I want to touch up a few places, and no compressor for a while. I found a somewhat local auto paint suppler that carries this system. basically an aerosol can that mounts to a jar and has gun that sits on top of the can. wonder if anyone has every used this. if you have the paint, much cheaper than them mixing you up spray cans. .anyone ??????