Needs about 5 more coats, but too late now.
I think it would turn out a lot better if the case was taken apart so you had bare metal to work with.
Note:
Do not spray the plastic pieces! The solvents in the PlastiDip will eat the plastic.
It certainly covers the slipping issue, but I think this will peel right off because it is so thin and it might need primer to adhere to the anodized shell. I have a feeling I'll be revisiting the tape on the back idea in a short amount of time when this stuff peels back off. Some Krylon Fusion in black would help with the plastic end pieces.