I've got a couple of teardrop ADB mice that I've cleaned inside and out with alcohol, and they're lovely in most regards.
That said, I can't seem to find a way to remove this ever-so-slight brown/black discolouration in the textured upper body.
I've scrubbed with water. I've scrubbed with alcohol. I've used a pencil eraser.
Nothing seems to remove it.

So, does anyone know how to deal with this, short of repainting my mice?