touchup

Hi Experts, To caveat, I believe this may be a form of flashing and I know the best thing to do is to paint the whole wall, however, it’s a difficult to do area with two windows (with curtains) and a door and I am all DIY’d out, so think I’ll just leave it for now if this is the best it can be...

Hi. New here so hello to everyone. Hopefully someone can guide me on this paint issue, which I've googled, but not found a sound solution. I've touched up the walls on the landing and stairs, using Dulux easy care white mist, due to a few light scrapes etc. However, as can be seen in the...