sounds like your down to the primer yeah, if its big enough to get your fingernail in then its more than likely going to need filler
if its not too bad then you could always try companies that do on the spot repairs, in the yellow pages
or treat it as a casualty of war and take it to a spray shop and get some things colour coded at the same time
mines covered in some deep scratches but i'm holding on for a few more "tesco badges" then i'm treating the car to some colour coding at the same time