Can these things be laser engraved? I did a search for laptop etching in google, but I come up with mostly mac laptops which have a metal casing. Since these things are plastic, can they be etched? And if so, any idea if it would look decent? Since it's possible to order lids for these things for cheap ( I think I've seen them listed for 18 bucks ), I'm tempted to pick one up to customize it. Figured I'd ask before spending the cash, though.