Yes. For an exterior (exposed to the elements) application, like a Harley-Davidson Motorcycle, you will want to get down 1-2 coats of the XTC Primer and then 1-2 coats of XTC. Coating a motorcycle exhaust is a very common application for XTC Primer and XTC.
TIP: Always apply thin coats and never heavy coats. This applies for XTC Primer and XTC.
Please be sure to check out the XTC Primer Complete Directions and the XTC Complete Directions before you begin your project.