Hi. I have jml magic eraser which is a sponge that gets rid of marks. If you are going to try one of these sponges though test a small patch first. With new houses you often find that a combination of cheap paint and plaster that has not had enough time to dry properly equates to chalky walls that are a nightmare to wipe
Probably not very successfully. I tried to do this recently, and although the paint was the same, the light bounces differently off the 'touched up' patches. If anything, they look slightly more noticeable than before.
Few marks on the walls of our beautiful new build house from moving furniture in, obviously dont want to repaint but would like to remove or cover the marks. Can I just but a tester pot of the paint the builders used and go over them?