red,
You didn't specify but I'm assuming you have polished aluminum pods. In order to be spun (shaped) or cast, it is a softer and more vulnerable aluminum prone to oxidation.
When they get heavy oxidation it really takes some elbow grease to restore them.
Spot address the scratches with a stronger polishing compound. Then buff out the entire pod with the finest polishing compound. Plenty of choices at an automotive supply.
Maintain the pods with a pure carnuba wax (no cleaner wax). Use only a terrycloth or worn cotton cloth. Apply several times per season.
Avoid paper towels when cleaning--too abrasive.
Powdercoating is a good long term solution. If it is a cast pod, it really needs to be baked in an oven (by the powdercoater) beforehand.

David