Well I've got two guitars one decent and the other not so decent but heck I love the not so decent one more cos I put in a lot time into it whilst trying to play guitar. Its got scratches and possibly sweat marks on the fretboard but as long I don't stuff up the bridge/pickup/tuning heads then I let the guitar go wild without cleaning. Me just too lazy.
And with strings... I remember reading a thread by Professor who was making rusty-free strings. He was thinking about selling them or something. I wonder how he's going with them.