I Plasti Dipped the bottom of my 13" MBP today. Makes it grippy and protected from scratches. If you aren't familiar with Plasti Dip it is removable, it just peels off. I only just applied the coating, so durability and functionality have yet to be tested. But I can already tell that it is going to remedy the bottom being so slippery. The look reminds me of the first aluminum iMacs.