Can Autoglym Metal Polish be used on Aluminium roof bars?

This can be used on your aluminium roof bars, so long as they are not plated.

Autoglym Metal Polish is a fast acting compound that will remove tarnishing from brass, copper, stainless steel, chrome aluminium and bare aluminium alloys, which are not lacquered.

This product should not be used on chrome plastic, lacquered alloy wheels, mirror finished metals or chrome plated in new condition, for any of these surfaces use Super Resin Polish instead.