Well, short and simple, I have a beat up PowerBook G4 that I got on eBay. I've updated it both on the hardware and the software end and it works beautifully. I've replaced the lower case as it was bent and dented pretty bad. The screen and screen bezel however are fine except for some old stains and dirt. Short of scratching the screen with my fingernail, is there a better way to get old dirt off of it safely? Also, anything I can safely use on the bezel without taking it apart? Didn't decide it was worthy of a good cleaning or replacing until after I put the entire machine back together and just don't have the time in the foreseeable future to disassemble it all again. Thanks.