Exterior paint cleans by caulking - and they have UV. They are not better inside .....
Epoxy is a hard tenacious paint .. enamels will also give a hard coat ... my guess is that's not what you want? the drywall under the paint will still dent ...
A bathroom grade paint with reasonable gloss would be ... and is what I have used. Cleans up and is mildew resistant.
Epoxy would be something to think about if coating block or cement walls ,,, even then it;s overkill for anything but a professional garage
spot on.
(Except the term is 'chalking'.... a microscopic outer surface on the paint washes off a bit over time. Its why cheaper exterior paint looks dull in areas that dont get washed regularly.)
I would get a very high quality semigloss or eggshell. I have a commercial acct w Sherwin williams, so buying Duration isnt as $$$ as a walk in. IMO, with paint you get what you pay for. The very best big box stuff (lowes, HD. menards) is nowhere near the top of the line SW, Benny more, etc. For cheaper paint, the big box stores are an OK buy. There have been some eye-opening articles around paint formulation, long term testing, etc.
Duration, Emerald, as I recall are the top @SW. I seem to recall they may be running a sale now through year end? 30% off? Which is close to std commercial discount.
Ive just been using epoxy on another project as a PRIMER- Macropoxy646 for 800 ft of exterior metal fence. I would NOT use this on sheetrock. It is very hard (sheetrock isnt) plus epoxy is not UV stable (it will yellow). Plus it will cost 3-4x latex. (For topcoat I am using Acrylon 218HS, a two part polyurethane, which is more UV tolerant). FWIW- this is a very very durable exterior metal coating system ive used for years. Per their spec sheet-Bridges, underwater drilling rigs, power plants, nuclear facilities....