We have really hard walls in our house, to get anything other than those little white plastic picture hooks with the 3pins (I've hopefully attached a picture in case my description is rubbish) needs a professional with a serious drill & even then it's not easy. I usually use command strips but I've got a few small mirrors on chains I want to put up & the ugly plastic things are the only ones that will work. Does anyone have any good suggestions to cover them up? The room has a vintage feel but at this stage I'd take anything. Many thanks