I wanting to paint a urethane plastic, Model TARDIS.
I've not used mold release, but i'm having troubles with the primer.
A lot of advice i've read, say that the paint just pools on the surface of urethane, but that's not happening with me.
On the tests i've done, the paint either goes on, but doesn't dry, or more importantly it does dry, but scratches off very easily.
Is the scratching off normal?