Aluminum Macbook Paint Chipping Off (Discoloration)

I bought my Macbook in 2009 i believe and slowly throughout the months i noticed paint chipping away near the trackpad on the lower right hand side edge. I thought it must've been something i did by accident that had caused that damage but then more paint started chipping off and i realized that there must be an issue with the Macbook. So now i'm here in mid 2011 thinking if its possible to bring it back to the store and fix or replace it? Does it count as a manufacturing defect or would i still need to have a warranty/coverage plan on it in order to replace or fix it?