The wax and grease remover, is that a liquid and did you dunk it in a bowl or brush it on? Just rinse it with water?
I hope you might try doing a short piece of track at some time. My last test failed. I had such high hopes for cleaning with mineral spirits, using the auto plastic bumper primer spray can with Tamiya can spray over it. with a 7 day wait in between for total curing. Just tried a little flex and it crack the paint. Not nearly as much cracking and peeling as my other tests. Can you flex the plastic with not cracking after air brushing? You future customs are going to look so good.
I hope you might try doing a short piece of track at some time. My last test failed. I had such high hopes for cleaning with mineral spirits, using the auto plastic bumper primer spray can with Tamiya can spray over it. with a 7 day wait in between for total curing. Just tried a little flex and it crack the paint. Not nearly as much cracking and peeling as my other tests. Can you flex the plastic with not cracking after air brushing? You future customs are going to look so good.