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Limewash and whitewash do not harm surfaces if you apply them correctly. Use on non-suitable surfaces can cause issues. For instance, applying limewash or whitewash to surfaces with existing sealants or incompatible materials may lead to poor adhesion or flaking. Also, harsh cleaning agents on limewashed or whitewashed surfaces can damage the finish. Proper preparation, application, and maintenance ensure that limewash and whitewash do not harm surfaces.

A fireplace can take anywhere from a few hours to several weeks to remodel, depending on the complexity of the project. For example, for a simple paint job, you’ll spend very little time touching up your fireplace, while larger remodels that involve replacing or repairing a fireplace can take up to 4 weeks.

How long limewash will last depends on the quality of the application and the porosity of the surface. For example, a limewash on brick will last five to seven years. If it's a home exterior application, exposure to specific weather conditions is also a factor. Limewash tends to develop a patina over time, and its natural look masks damage and imperfections well.

If you’re deciding between limewash versus whitewash, know that both have a chalky matte appearance. Limewash is made from lime, water, and sometimes pigment, while whitewash consists of lime, water, white chalk, and binders (though you can get a similar look with watered-down white paint). Whitewash has fewer options for color customization, and it sits on surfaces instead of being absorbed into them, which can trap moisture. Whitewashing costs less—about $1.40 to $4.20 per square foot.