Pcp compressor

Hello Everyone, just joined because I got a Seneca .50cal for my birthday back in August and was getting tired of hand pumping so I broke down and got the Yong Heng compressor. My question, after watching a zillion you tube videos is this: why couldn't we use antifreeze instead of water? most cars have an aluminum radiator......can anyone set me straight? 
 
With your budget I would take a look at the air Venturi 4500 compressor.

I've had one for four years now and it has worked great. Out of curiosity since the air Venturi 4500 compressor has been out now for a while I did some research. Find out how many hours people have on their compressor before they had to do a rebuild. An also to find out what complaints or problems if any people had. Come to find out most were very happy. But I could not find anyone who has had to rebuild their machine. When I say rebuild I mean the high pressure sealing rings. And the lower compression and oil rings.