Whats a good polish?

Alright, Ive been striggling to find a good polish for polished wheels and diamond plate. I want to be able to keep the diamond plate toolbox in my truck looking new and my wheels looking alot better but i cant seem to find a polish. anyone tried out the powerball on them yet or should i be the 1st? I just found out today i cant get rid of my truck so i might as well keep it looking good.