You can opt to paint doorknobs. You can also paint both the sides of the hardware and within a short span of time, you can attain the best results for your old doorknobs. However, while opting for painting the doorknobs can help you to save a lot of time and money, it is also important that you must only use a light coat of paint. If you are not careful, it can cause paint drips, and therefore you need to sand down the hardware as much as possible before priming and painting.
After letting the same dry up all over the night, you can simply spray paint. Ideally, using 3 light coats of oil rubbed bronze can work best results. If you need to touch up, then you need to use a bit of paint and then Q-Tip can help you to get the best results.