VHT Satin Black Barrel Paint has been custom-formulated to restore motorcycle engines to their factory original appearance. It is extremely resistant to oil, fuel & solvents and is heat resistant to 550°F (287°C). It virtually stops rust and corrosion whilst resisting chipping, cracking and fading. The use of an etching medium or self etching primer is advisable prior to coating stainless steel. This will help ensure adhesion. After using the self etching primer you can apply the paint, or add another layer of primer which can be sanded smooth prior to the topcoat. The Aluminum doesn\'t require a self etching primer, however it is not a bad idea just to help the bond.