Yeh I'm leaning that way it just never looks as good as when a pro does it. My main concern however was that I didn't want to do a bad job and trap the rust underneath any paint and make it worse.
Having been binge watching vids on chip and scratch repairs, I would:
Sand with wet and dry, hole punched and stuck on a pencil like the Ammo NYC vid
Treat with a rust treater like k rust or similar
Very lightly and super carefully dib a thin layer of primer on to the metal only! with a cocktail stick. Almost no paint, but enough cover the metal.
Paint with a 50:50 mix of colour and lacquer. Maybe 50:50:25 colour:lacquer:hardener if you can get some hardener. Like the first bit of the vid on the black Merc in the Mirka vid I linked. Over painting the chip for full coverage.
File very very carefully with no pressure, the proud paint chip using the Mirka file.
Polish.
On these tiny spots, if you don't have a DA polisher, just buy some eBay foam 6 inch cutting pads and do it by hand.
The thing I haven't researched yet is where to get decent paint, lacquer and hardener. Could just use a paint pen (to provide you with a matched paint), or similar from the dealer, and mix a little bit in a bottle cap with some lacquer.