Maybe i used the wrong paint? I used "Tamiya Color" spray cans from the local hobby shop. After rolling my new MB a few times ALOT of paint has chipped off the inside of the roof area. It's not from contact with the roll bar, I think it's from the roof "popping" in and out from the impact of the roll, BUT is there a better paint I can used that won't come off so easily?

Thanks,
James