Dave, much appreciated input. I may have to look into a clear coat chemical anodize that I can apply on site.... I will take a look at the base aluminum alloy and see what it is. I'll report back on what all I find out and decide to do.Aluminium masts are typically anodized to prevent future corrosion.
See this description: Anodizing - Wikipedia
Polishing it will remove the anodizing which will promote corrosion.
dj