Oliver and Ali McPherson like to take dull, stained metals of all kinds and polish them until they shine from aluminum and stainless steel to brass, silver and gold. But the process, they warn, can take up to a week or more. The twin owners of Atlanta Custom Metal Polishing on Metropolitan Parkway take on any jobs including: wheels, engine cases, valve covers and light fixtures. They work on all vehicles including: car, motorcycles, boat and marine parts. And they accept all clients including body and paint shops, antique and furniture stores and private customers who enter their vehicles into car shows seeking to win the grand prizes.