BACKPLATES ARE THE ANSWER
Thanks to everyone who suggested that I get some backplates for the kitchen cabinet knobs — they weren’t super easy to find for a reasonable price, but I did manage to find a good deal on chrome kitchen backplates (about $1.17 per backplate including shipping) from HD Supply. I ordered them on Friday and they were delivered Monday, so I installed them right away.
The really great part is that they cover up all the missing paint spots — no touch up needed!
I think they will protect the cabinet from further paint chipping in the three areas that were suffering from chipped paint.
They also up the retro factor in the rest of the kitchen too — a win-win if you ask me!
What do you think about my retro-upgrade?