I personally would leave it as is and put neon on it. When neon is lit, it takes some of the 'scars' away. However, if you want it to look better I agree with Wocopep 100%. Just touch it up with paint, so it can always be removed.
I also would not tear an original sign in half to sell one side. These things are only original once.
Just my preference and 2 cents,
Last edited by Speedracer; Sun Dec 23 2018 09:38 PM.