I picked up an Athearn AC4400CW and a Bachman/Spectrum Dash-8 off of Ebay to restart my model railroading. I haven't painted anything in a long time and think I screwed something up already I am using Badger Model Flex paint for the first time(all that was available to me at the time) I sprayed on a coat of paint that went on ok, but when I went to tape it off for the other color the paint would peel off with the tape. This brings up several questions. 1. What should I be thinning this paint with? or do I need to? 2. Do I need to strip them back down and start over? 3. And what would I use to strip them? Back in the old days we used brake fluid Thanks for your help.