Hi, I build plastic models and like to detail them as much as possible, especially the body work. With my most recent car, I first sanded all the parts that needed painting. Washed all parts after sanding. Airbrushed the 0351 Wicked Metallic Silver on all parts and this turned out okay, I touched a small part on one of the pieces and it was fine, paint didn't come off. Then I applied the 4654 Grabber Orange Candy2O. After letting it dry overnight, when I tried to apply a clear coat, the Candy color just ran like as if I had just airbrushed it on. So then I got a damp (with water) paper towel and the candy just comes right off. After wiping off some of the Candy, the metallic silver was fine, that did not come off. What am I doing wrong?