I know, I had purple Topline cranks, purple rings, used for a couple of rides and started to wear the anodising. :cry:
So I sold them and got some silver M737 cranks, that still looked good after many rides
Those are nice cranks though, all I can suggest is try and use some helitape on the crank Arms. In the end they can always be reanodised a few years down the line.