Disaster! After a mere 160miles I have now got a 1" long gouge into the front mudguard on the top in a prominent and painfull position

(never let work colleagues go anywhere near your bike!)
any advice on repairing this mark it is quite deep, through the laquer into the white plastic underneath. Is there an easy fix that may be carried out?
Or should I see if at my 500mile service they can sort out the mark?
Im very new to the bike scene with the bonnie my first big bike and im not the most tech savvie..... ie clueless
Thanks in advance
