Hi guys, I am working on the Rampage and i'm having some problems with getting paint to bond with certain pieces of the toy. Its those pieces that look particularly opaque or darker in color, otherwise there is no such problem. I applied tamiya primer then painted over the primed surface with lacquer based paint and finished with gloss coat. The paint layers are not in anyway tacky, but the paint are still easy to scrape off. Does anyone here have any good advice to solve this problem? Thank you in advance.