Okay, I've tried Testors Dullcoat right from the spray can, but it started looking yellow so I don't want to go there again. I tried mixing Tamiya Flat Base with Future, it seemed to work out for a while but then started to look to frosty. I was used Pollyscale Clear Flat/Satin but I think I may have ended up with a bottle from the bad batch a few years back & it put a bad taste in my mouth. I've been using Model Master Acryl Flat but again it's looking frosty. What I mean by that is my panel lines that were washed black seemed to have turned white on me after applying the flat finish. So... HELP!!! I feel like I've ruined another model & am close to finishing another & don't want to screw that one up also. Thanks.