Paint a frame to conceal trouble spots: A lot of times old mirrors will have the most spots around the very edge of the mirror because that’s where water got splashed or steam from a bathroom would creep behind the mirror over the years. While you can use the above tricks to fix or minimize damage on the edges, you can also tape off a border or design, use a few coats of spray paint, and create a new frame that covers up the spots instead! I’ve found that most spray paints will hold up just fine when cleaning the mirror with glass cleaner, but you can always buy a small craft mirror and test out your paint first if you want to make sure it won’t wipe right off during cleaning.