Here’s a Creative Solution for painting doors: cover the knobs and locks with Glad Press’N Seal.
I had seen this pin on Pinterest which comes from The Family Handyman
I’ve successfully used this trick while painting around difficult spaces. Instead of taping, I also tried it on light fixtures and doorknobs. Works every time! The stretchy yet sticky nature of the Press’n Seal is perfect for painting. It adheres to metal and ceramic better than tape and creates a better seal.