That compressor on eBay would be fine army310, as would a 3gallon (about 10L) pressure pot.
A lot of us use a converted pressure vessel made from an automotive spray paint pot.
I can pressurise the above pot to 40PSI with my twin piston airbrush compressor with a 3L tank, but it takes over a minute to do. A lot of resins will be gelling whilst the tank/pressure pot is filling, and the results will be poor. With a 2.5Hp with a 40L (10.5 gallons) tank, the above pressure pot will fill within a few seconds with a fully charged tank to about 80PSI.