I havent done anything like that to it. Its been a year since I bought it so some of the dirt and wear is from me. Its been to the shop a couple times for tune ups, repairs, and such. I actually do not know much about bikes, this is my first 'real' bike so I dont know much about the maintenance I need to be doing. I spray the chain with Tri-Flow whenever it gets rained on or I otherwise remember to, and pump up the tires before I ride all the time, thats about it.
Funny story; no one told me that you are supposed to unscrew the little valve to inflate the tires, I just thought that high-pressure tires were a pain in the @$$ to inflate and required an air-compressor. Went to the bike shop to buy a new hybrid for school since this one was giving me so much trouble, felt like a complete idiot when I saw them inflate the tires with a floor pump. XD