Here's my latest finished work. It's the mouse that came with Commodore Amigas. I've added some dirt and made the plastic yellowish since it usually yellow over time. Modelled in Maya and rendered in Maxwell.
hehe you definitely nailed the collection of dirt around the bottom lip of the edges - that brings back memories
for small improvements to add realism you could give the bit where the chord enters the mouse a little wear. The other bit that could get a little grubby was the grip part of the chord plug (with the c64 bit on).