you talking about using the metal polish you can't find then using the mothers?
That's defeating the purpose really, one metal polish is about the same as another, if it's a good trucker or chrome shop polish, that's all you need, and it be a waste of time to use something like power metal afterwards. Only time power metal or reg. mag/alum. would work would be for touch ups after the real polish just to help protect or to restore shine after you polish and it began to dull again.