Type III anodizing is a pretty tough finish for aluminum. Since it is a chemical conversion of the metal it won't flake off or peel. It only goes down a few mils from the surface so any deep gouges would show, but it might last for quite a long time.
For rudder pedals, some appropriately sized hydraulic hose from Napa, split lengthwise. Cheap, looks good, has added benefit of keeping toes a bit further from brakes.