How do you remove stains and scuff marks from walls when the paint keeps coming off?
If the walls are done in flat white paint and you choose to repaint certain areas there should be no noticeable difference. That is if the house is truly freshly painted. Flat paint doesn’t reflect the light the same way satin or eggshell does and is much better at hiding flaws in the ways because of this but a pain to clean because as you have found out it comes off. You can also try Mr. Clean Eraser first or just mild dish soap and soft cloth. If you do touch up the area and there is a noticeable difference chances are the paint isn’t that fresh or yes, cheap paint. Another option is to repaint solely that wall either in white or an accent color. That way if there is a color difference it won’t be as noticeable. Hope this helps.