After going through dissembling and spray painting Ultra Magnus into Nemesis Prime (well, it's 90% there), I wanna try my hand at brushes with Thundercracker. I picked up a set of brushes and Testors acrylic paint at Walmart tonight. Should I thin the paint so I don't get brush lines? If so, can I thin it with a little acrylic paint? The silver spraypaint I used on my Nemesis has acetone in it and it works awesome, I was wondering if the principle was the same with brush paint. If so, what ratio of paint:acetone should I do?