A lot of it comes down to CFM's delivered at the nozzle...
I'm using a McMillan C12 10amp V-Twin compressor...It has a 60ltr tank (58 actually).Free air delivery is around 8.4 CFM (238ltrs per minute).
For the work I do, this is basically the bare minimum...It handles the air staple gun (for professional braiding) well, air die grinder well, blowing etc well. As far as painting go - I only use 2k automotive paints and clears and again its the minimum I'd use. Although a cab is not a lot of actual spray painting time (compared to a car) you don't want the compressor running red hot constantly.
For sanding cabs (quality orbital units) - it works OK.
This sort of compressor will set you back anywhere between $800 to $1000.
Automotive quality hose (20 mtr) $50
Water trap / reg $35
I know a few people who have the smaller Bunnings type compressors. I know one which has lasted about 2 years and gets used weekly - but mostly for pumping up bike tyres and blowing stuff out of stuff when required. PERFECT for this type of application.
The other I think he is on his second in as many months, but its almost getting used daily and just not the right sort of unit for his needs (part time tradie).
One thing I've learnt over the years I never skimp on tools. When I started working on pinballs a bit more seriously, I splashed out on Snap On screw drivers (full set inc jeweler), and I'll be saving soon for a snap on socket set as well (I'm on my second set of $150 ones so just not worth it in the long run)...When you use one compared to the cheaper, its definitely worth it.
