deep scratch

Today I noticed a deep scratch on my fender that's about a 1/4 of an inch long. It looks like it's down to the metal. I have a 2008 M5 in Monaco Blue metallic. I have an appointment at Rallye BMW in long island for warranty repair tomorrow. Should I let them repair it or refer me to someone. Or should I go to my local body shop or detail guy? I know everyone is going to say they can fix it. I just want it fixed right so that I can't see it, money is not an object and I don't want the fender repainted.

Anyone have any experience with anyone who does expert work in Long Island. Thanks!

Just ask them where they take their cars to and do it yourself. I'm sure it will be cheaper