After looking at this mouse the first thing that jumped out was it kind of looked like a snake head. I started messing around with colors and thought Green and Black go well together. I would strip it down and paint it with a snake skin look...I did the best I could in the pic below to show what I'm talking about. I'd Shade it a little more in some areas to give it a nice sleek look....After to get the rubber texture back for grip I would use a clear rubber spray like Plasti Dip or a product close to it. For the Keyboard I was thinking about a matching look...Id leave black highlights here and there and also leave the keys the way they are(Maybe a Black snake skin look on the keys) and the fan blades would be painted green.