Being it's on a black finish and where it's located and if it were mine, I'd just cover it with black ink.. PLANET WAVES PW-PL01 looks to be a polish.. It may just fill the scratch with a substance that would hinder future repair..
Your lucky the guitar is black.. My ding is right up where everyone can see it and guitar is midnight wine color.. (Reminds me of having a pimple on my nose..)
Good Luck with your fix
Gordon