Black Diamond Alloy Shine

Price: £3.75 Size: 500mlContact:

While others have rushed to join the ‘purple’ bandwagon, down-to-earth brand Black Diamond has stuck with its successful acid-based formula. The pack is vague on what surfaces Alloy Shine can work on, but it’s good for chrome so it’s likely to be okay on delicate finishes. It worked well in both the rinse and brush test, putting many more expensive options to shame

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