Blizzard Magnum 8.0 CA skis, over 700,000 vertical feet on them this year. Bases are white going from the edge to about almost 1/3 of the way in under foot, and less as it moves towards the tail. Inside edges (I have a L. & R. ski due to a plate under one to compensate for Leg Length Discrepancy.)
Hot waxed these skis a lot too, close to 30 times, but don't use too hot an iron or keep it on the ski without a light upwards pull.
What can I do? Just keep waxing and using them, or is there some way to restore them? Will a stone grind eventually take care of it?