you need a good hi-flow compressor which I don't have.

I bought a cheap compressor so I could take it out to customer jobsites and
it would fit in the back of my wagon. The $99.00 GMC one from Bunnings, the
Australian hardware chain store. It works pretty well, but only has low
recharging flow from it's 1500 watt motor and a small 24 litre tank.

To improve it, I added a second one and hooked the two together with a
simple hose, WOW, it really roars now and will keep up to even my spray gun
happily for ages. They both have two outlets, one regulated and one straight
out of the tank and this is where I connected the hose. The two motors cut
in within a couple of pounds of each other and apart from wanting it to be a
bit quieter, it's more compressor than most of the $500.00 ones I've used.

Hope this helps,
Peter