When we were in our last rented house, the day before an inspection I walked into the office (which had been newly done out with new fitted furniture ect) to find my little one had drawn in green marker pen all over EVERYTHING!!!!! I mean literally everywhere, all over the chair, the drawers, in the little groves in the pattern on the cupboards, all over the desk!!!! I could have actually cried, (was the only time he ever drew on anything he shouldn't as well)
Luckily with a lot of hard work I managed to get most of it off and then boyfriend used his chemistry skills to work out what we needed to get the rest off, we could still slight marks but think that was just because we knew it was there as it was never picked up on.