Topic: Having a literal "art wall" that can be re-used?

I was wondering about the idea of having a literal wall (say, in a backyard of something) dedicated to experimenting with art (all mediums) and if this was possible, to create, take a picture, then paint over with white or simply layer with new creation? Would this work in circumstances of paint? For people more familiar with these mediums, will the paint harden and become too thick or crack or...? What would this look like when taken out of theory?

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