Communication on page 14926 ff., SG Mitchell, C. Streb, and co-workers show how
polyoxometalate ionic liquids (POM-ILs) can be used as brush-on anticorrosion coatings on
natural stones. The POM-ILs are designed to withstand corrosive conditions and feature
antimicrobial components, which prevent the formation of bacterial colonies on the surface
of porous and non-porous limestones.