Wm cheng:
Maybe your refrigrator compresor was damaged or very used, because the one I have seen is almost new and doesn't really heat up that much.. I mean not to the point to burn your fingers, besides it's not conected directly to the airbrush, instead is conected to a regular compresor tank. It has an oil filter too. And I hink is 1/3 HP. To me looks like a good choice for a silent compresor( adapted to a regular compresor), however is higly recommendable using a new fridge compresor or one with very little use. BTW I'm young and poor!!
Regards