When I polished up my TT Comps from a corroded condition, I used 800, 1200 and 1500 grit wet n dry with warm soapy water. Then G3 cutting compound, Autosol metal polish and finished with Autoglym metal polish. To protect them I used 3 coats of Collinite 476 hard wax. Still going strong 18 months on with only a quick clean every couple or few months.
Good luck with it mate.