wet sand it with 1500 grit paper than buff it out with auto paint swirl remover and it will look as new if it's not too deep. If it's deep, fill it with superglue first then sand and buff.
http://www.stewmac.com/shop/Glues,_..._Super_Glues/Instructions/I-5180.html#details
http://www.stewmac.com/shop/Glues,_..._Super_Glues/Instructions/I-5180.html#details