I am using Corvette suspension under my current project.  I am having the forged aluminium parts professionally polished.  I want to seal the parts with something to prevent oxidation.  I have heard clear urethane, powder coat, Zoops, wax, mineral spirits.  I need some help making this decision, I dont want to have to constantly polish them.  

I sealed a buddies aluminum wheels 3 years ago with clear powder coating, he has never had to polish them in that period of time!