I have seen "cheap" equipment fade as well as expensive equipment. I have seen two anodized parts side by side for years with one part fading and the other part looking as good as the day it was first anodized. Case in point is the AstroPhysics 2.7" focuser on a Star12 ED. This scope dates from the early 90's. I acquired it about 9 months ago. As you can see from the photo - the focuser has suffered from anodization fade, while the "adapter coupling" which connectes the focuser to the tube has not faded at all.
I have replaced this focuser with an AP 9 to 1 two speed and that has essentially fixed the anodization problem as well as giving me a focuser upgrade. New focuser is very nice. See focuser in need of a reanodization, followed by a comparison to the new focuser after the old focuser has been reanodized.