i have noticed that the black felt-like interior of my protective case "sheds" and leaves tiny particulates on my clear keyboard protector. it does not harm, but is quite annoying... as for preventing your white MacBook from getting stained, you might want to consider the various clear plastic shells/protective cases that are available for your MacBook. Speck makes a nice one (i have one of those around my white MacBook) and will keep the exterior of your MacBook stain/scratch free for as long as you own it! You can get a variety of other cheaper/less expensive shells on eBay, just make sure you avoid getting the ones that have a cut-out for the Apple logo as it will allow dust, link, particulates to accumulate around/in the cut-out. While you're at it, if you really want to keep your MacBook looking nice, get yourself a trackpad protector as constant use will leave a discoloring in the center of the trackpad... and get a full-length keyboard protector to also protect then wrist-rest area from the common discoloring that can also occur. if you need help finding those items, let me know, as i have added a few of those sellers to my "favorite sellers". i just bought the new 2.2GHz Santa Rosa MacBook (MB062LL/B) and plan on getting a screen protector as well as new neoprene case (but with a light green or grey interior so the particulates/link does contrast so much!). yeah,i baby my MacBooks... but they in turn have treated me VERY well! hope some of this helps!