Painting the case is definatly an option and you could be suprised by the results.... definatly find a hobby shop (stay away from michael's or Hobby lobby) "any place that sells more do it yourself fake flower kits and picture frames ect..... find an honest to goodness R/C and model shop (planes trains and automobiles) and they will have a fine array of small spray cans of plastic specific paint (most all R/C cars come with a clear polymer shell you must paint) this paint is specifically formulated to bond with plastic of all kinds and it an R/C car crashing several hundred times in its hard little life to chip the paint then your not gonna have to worry about it on your mac. They have many translucent to darn right clear colors availible that would look awesome on the snow colored macs!