Here are some things you can use to elevate the uses of your bags:
1) Metal Polish
2) Felt cloth
3) Bag organizers
4) Decorative strap extensions & Charms (Bag accessories)
5) A different strap/ Chain strap
6) Leather extension buckle
7) Strap shortening device
p.s. Do you know that for rusty zippers, you can rub it with some candle (wax) to make it smooth? (Just make sure to clean up the shreds left in your bags... XD...)