hello all, I would like to ask you some advice. After my first compressor was leaking oil, I had decided to invest in a brand new compressor, so I know its history and "live happily ever after". Four months ago I've buyed a brand new Emax TAT 2021 compressor. In the showroom the lady told my how to take care of the compressor. She told me a couple of times that it is very importent to let the air out of the tank after I used it, never let the air in the tank and let the tank open till next time. So thats what I have done since day 1. But a few weeks ago, when I let the air out after finishing, I saw brownish water/ice coming out of the tank. Because I wanted to look at that, i moved the compressor, and more drops came out. Because of that I gold the compressor at different angles and their came out a LOT of brown water..really a LOT. I contacted the saler, Because I have did everything she told me to do to take care of it to prefent rust in the tank, and ask her if she could help me fixing this problem. The answer i've got from her is that I should not worry about it, Because all of the tanks Will develope rust at the time. And the airfilter will take out rust particels if the came out the tank by the airhose. Now I am a bit confused, Because in the showroom the lady kept telling me that iT is importent to don't let the air in the tank, and ALWAYS de-compress it after use to prefent rust in the tank. I specificly asked her that day if I de-compress it after using is all I need to do to prefent rust, and her answer was yes. And now, when rust build up in the tank after only 4 months, she tells me that it is not a problem. So, i really would like to know if it really isn't a problem?? I hope someone could help me out. thanks a lot!