If it's only two lines then I doubt you would visually see a difference between that reflector and a untouched mint reflector in real world use.
Those two scratches represent a very, very small percentage of the total reflective area and isn't something to be overly concerned about.
Yes, it's annoying knowing they are there, but dwelling on it will only lessen your enjoyment of that flashlight.
I don't think it would be a good idea to try to polish the scratches out, as this will likely cause more harm than good.