[kikkoman]

I started noticing gray spots on my white MacBook a few weeks after getting an Incase nylon sleeve. To prove my theory, I took a white paper towel and rubbed it along the inside liner of the sleeve. Sure enough, the paper towel had blackish gray stains on it. I'm guessing it was a dye used to color the interior material. I turned the case inside out and threw it in the washer and that seems to have gotten rid of the excess dye. Now I have these stains on my Macbook I'm trying to get rid of. Pure bleach and watered down rubbing alcohol had no effect. Acetone took it right off but dulled the plastic. Any other suggestions?

[jamil5454]

Acetone took it off because it took off a layer of your protective shell. I would just leave them and let them wear off on their own if they're not too bad. You could also try using an ordinary magic eraser.

[Rally1]

Have same problem, but from the Vaio sleeve I was using.

[kikkoman]

Just an update, a stronger concentrated (91%) alcohol solution managed to lighten the stains to the point where they are barely visible.