Whether your mirror is a large mural-sized glass or a freestanding bathroom piece, an unblemished surface is a necessity for both the mirror and the room in which it is placed. You can resurrect your old mirror simply with items that can be easily obtained, and you need no special training to perform this home repair job. Try perking up that mirror yourself instead of discarding it or sending it out to be resilvered.
Lay a large bath towel on a flat surface and place the mirror on top of the towel so it doesn't break.
Remove the area that needs new silvering, or the entire face of the mirror, with the safe scraper.
Spread the chemical remover over the silver to be removed, if you choose not to scrape it. Allow the chemicals to remain on the glass for 15 minutes, then remove with a microfiber cloth.
Lay the new mirror within the frame or the clamps of the old silvering. Place the frame front or move the clamps over the new silvering and adjust everything into place.
Move anything that's supposed to hold the glass in place to the correct position. For example, if there are wooden pieces make sure they're holding the glass by placing them horizontally across the mirror.
Keep mirrors clean by using a commercial glass cleaner.
Dispose of chemical removal agents carefully as they contain harsh and dangerous chemicals.