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Yes, you can limewash surfaces other than brick. Plaster, stone, stucco, and concrete can all also be limewashed. Any porous surface that will absorb the wash is a good candidate for limewash, although it won’t help much with waterproofing. If you choose to limewash over paint, you’ll need to prep before applying it to avoid a powdery, chalky finish. Shiny surfaces like metal or glass can’t absorb limewash, so it’s not suited for these.

Limewash can be removed from brick, but the method of removal will depend on how long the limewash has been on the brick. If the limewash has fully dried—which happens after about five days—you’ll need to use a diluted muriatic acid mixture to remove it. If there are multiple coats of limewash, you may need to apply the acid mixture several times to fully remove it from the brick.

You should clean your home’s brick once per year. This applies to exterior brick, but also to cleaning brick fireplaces. Create a homemade cleaning solution with equal parts vinegar and water. Use a soft-bristle brush to scrub the solution into the face of your brick and remove dirt, algae, and stains. Cleaning will protect brick from damage and boost your home’s curb appeal.

It is possible, albeit a lot slower, to break up a rock using water. You would do this by freezing and thawing the water. You could create some initial holes or cracks in the rock, then pour water into the cracks or holes and allow them to freeze (so it's best to do this in winter or in colder climates). Since water expands when it freezes, this puts pressure on the inside of the rock and causes it to crack. You could continue to pour more water in and let it freeze to continue to break up the rock.