Be aware...
If the tool box is anodized, DO NOT use anything that is an acid base, as is so many alum cleaners. It will destroy the anodizing and the alum will start to corrode. If it isnt anodized, dont use anything acid based as it will turn it white! (and it will corrode! LOL)
If it is anodized, use a good cleaner/degreaser, and use a mild polish such as neverdull, or something made for anodized alum. and be gentle. If it isnt anodized, use any good cleaner/degreaser and polish it with a polishing compound, or a very fine scotch brite. Then protect it, as unanodized alum will corrode.