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Yes, brick can breathe through limewash. Limewash is a breathable coating made from natural lime and water, allowing moisture to pass through while providing a protective layer. Unlike synthetic paints or sealants, which can trap moisture within the brick and lead to issues like mold, limewash allows the brick to maintain its natural breathability. This characteristic makes limewash an ideal choice for historic structures where preserving the integrity of the brick is essential.

The white stains you see on your bricks are likely efflorescence, which is salt and lime buildup. To remove efflorescence stains, simply brush them away with a stiff brush. For larger, more stubborn stains, scrub the stains with a water-detergent solution.

Yes, but used or reclaimed bricks can be more brittle, cracked, or uneven than new bricks, so they’re harder to cut cleanly by hand. For that reason, you should take extra care when scoring and striking, and expect a higher chance of breakage. If a brick feels especially fragile, score deeper before attempting to split it.

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.