Quote Originally Posted by Les McLean
It rubs off quite easily although the walls do need retouching but that is expected in a gallery.
Uh... I really would check with the Gallery first.

The idea that... "Oh well. they expect to `touch up' (a.k.a. repair damage)", can wreak havoc on the walls in a *very* short time ... and one might just be the one who happens to be in line for the initial brunt of the consequences.