Yes, I used ACF50 on all exposed alu and plated nots/bolts etc. Also in the engine bay. I used Dynax S50 for all the 'grot traps' and where the alu meets with the chassis. The Dynax comes with a long spray applicator, which enables you to reach all the awkward traps. Too early to say how good it will be, but I'm confident it will be reasonable protection. cheers Keith