I am just about to start painting the black and yellow Pocher Bugatti. I will prime, paint, topcoat and polish the black. I would prefer not to paint the yellow at all and wonder how Tamiya Pocher Bugatti painting question #13 top coat will adhere to the yellow plastic. What preparation should the yellow plastic have prior to the topcoat? Should I sand Pocher Bugatti painting question through to 12000 grit and then topcoat? If top coat is not a good idea on the yellow plastic and a paint is best is there a rattle can spray that can be recommended for the most accurate colour. Thanks for help in advance.