You can get spray painting units that fit on the end of vacuum cleaners. You see then in brochures too, but I wouldn't like to re-spray my car with it!

Professional abrasive blasting places typically have things like 175 psi at 50 cfm compressors [very expensive] or more. you just can't have enough cfm and pressure when blasting. Massive amounts of air pressure are need to do a half-decent job.