I received an AR coated lens for my convoy C8 today. While installing it I decided to clean the smooth reflector not realizing that I used an ammonia based cleaner until it was too late. It made about 25% of the reflector surface a yellowish gold color. I'm guessing it had a chemical reaction to the surface because it won't buff out. Is there any options to eliminate the discoloration? I don't want to try anything else that may worsen it.