As Fetish Girl points out, I've been shuffling all the colors together. (I have 2 each of 7 colors). That's surely worse treatment than you'd normally expect, since at the table, you're likely to be shuffling chips all of the same color. But the contrasting edgespots will still cause discoloration (See FetishGirl's picture). Also, the buildup of the chip dust makes the chips kinda grimey, they start sticking together, and don't shuffle as smoothly.
My 1-day results may well correspond to what you'd expect to see in a year or normal use, since you're likely to be cycling through 200 chips, instead of constantly shuffling the same two chips.
But at this point, I don't expect the wear process to ever end. Some Paulson casino chips I have are really worn down --- the edges are quite rounded over. These chips are just basically softer than ofther chips.
Try the crayola test --- just take a chip and write on a piece of paper.
