Thanks all. After going back to square one and basics, I went back to one tank and am getting 100% results - except for one thing - the 7075 parts are still streaking with black marks. I've tried 6 ASF, 9 ASF & 12 ASF with all the same results. These marks are apparent after going through the first cleaning process(15 minutes @ 140 deg. F)
Can someone guide me on this so I can get ris of these marks.
Thanks Again,
Kevin