Snaps would help.

panjetty: I think the color a house should blend into the neighborhood homes. The exterior paint on a home should not stick out like a sore thumb. If a person lives in a San Francisco neighborhood where the houses are called painted ladies, you might paint your home purple and that purple would blend in for that particular neighborhood (photo below). Some neighborhoods (gated communities) dictate to the home owner what color house is acceptable, so the gated community neighborhoods always remain beautiful & cohesive. I do not disagree with you, but I always look around the neighborhood before I have my houses painted and I appreciate my neighbors who also look around the neighborhood and choose colors that blend in and do not "make a statement".

you will need to make Grooves in plaster and then paint.It will look like tiles.