If it's going to bother you then you should.. it's very hard to ignore something like that. You'll end up thinking about it all the time. ( I would anyway)
before you do try getting a really really soft cloth and buff it, it may fix it. I'm not sure how the miroirs are made but I don't think it is metal coating on vinyl
I tried that already but from the looks of it, it is "underneath" the coating.