Apparently there is something in my body chemistry that reacts with the case of my MBP that causes it to corrode and pit. It is not a hygiene issue either and I am not alone as I have read in many places that this happens to others. There is pitting where my hand hits the front edge of the palm rest as well as on the bottom where my thumb touches the bottom of the case. I have not seen a wrap that covers the edge. I have heard about using tennis racket grip wraps but those don't stick. I have also seen people use clear packing tape but I am hesitant to try that. Any suggestions?