What is the proper way to get an even finish when painting a metallic hood without getting the stripe effect when applying the clearcoat?

What is the proper way to get an even finish when painting a metallic hood without getting the stripe effect when applying the clearcoat?

Finish Application

If the stripping is happening only after you start applying the clear coat it is possible that the basecoat is not completely flashed off when the clear in applied. This can cause the metallic to shift. Another possibility is that the basecoat has been applied unevenly, with the wrong reducer, equipment, or air pressure and the stripping is in the base but not visual until the clear is applied. I would need to know a lot of information to help narrow down what the problem may be.