Welcome to the new and improved Proflex / K2 Tech Forum!
But when you're polishing it, you're polishing the clear laquer coat not the aluminium (unless the laquer coat has completely worn away...........)so you're possibly just making the remains of the laquer coat dull through using an abrasive polish.Col.
On the plus side, whilst polishing it, you're making it lighter!Until it all wears away...........<GRIN>Col.