Enameled Vintage Keys DIY
She also used fingernail polish to identify keys. It made it easier to know what the keys were for. All keys seem to look the same nowadays. Most of the time I have no idea what some of my keys are for.
I have a huge collection of vintage keys and a bottle of nail polish near my computer. The other day, I decided to paint a key with polish, which then led to another and another. I couldn't stop. Sure, you could use spray paint, but you won't get the wide variety of colors and the satisfaction of painting your keys with a little polish brush. It's also a great way to get rid of your nail polish, something I never seem to be able to do.
The result is fun and cute. Hang them on a chain or ribbon. Wear them. Admire them. At one time they unlocked something special.