I had some white vht primer I decided to use up on this to build some thickness quickly. This is the only peice where I used a primer. Then used a aluminum kbs spray on the resonator area, these were kind of aluminized originally so wanted to replicate the appearance there. The rest of the pipe will get the darker grey metallic color, brush on two coats kbs charcoal metallic and final coat of vht cast iron grey spray.