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How to prepare metal cleaner 
Scrub the aluminum with your ph-balanced cleanser to remove food, dust, dirt and grime. 
Most aluminum is actually aluminum alloy because aluminum itself is very soft. Keep this in mind when cleaning and avoid harsh chemicals and abrasive sponges, since you don't know which alloy is used.
Mix a solution of water and 2 tbsp. ( 29 ml) of vinegar, lemon juice or cream of tartar for small pieces of aluminum or aluminum cookware.