I really love the look of a faux concrete wall, and I would like to try it using joint compound and liquid cement colour. However, I'm a bit nervous to try it as I've never done anything like it before. How difficult is the clean-up? Is it difficult to get off the floor?
Try outside on a piece of wood or somesuch, that practise makes so much difference to the real thing...
As for the floor, put down plastic sheet, taped down to cover the edges, and that will protect the surface.
Works well for any painting, decorating or other work. But if it is a carpet, then the first thing I usually do is to roll the carpet back out the way.