Researching this could be quite a time-suck, and I'm sure some DIY'ers here have already done it! I'm looking for advice like, "Just go to BigBox-A and look for Brand-X."
I need to freshen up all our interior trim (flat white) along with some wainscoat in a bathroom. But I may also need to re-do some whole rooms, depending on how well my touch-up paint still matches.