Enov StoneClean is a concentrated extra strong acidic cleaner and removal of severe scale. Based on a special blend of surfactants with hydrochloric acid. Removal of rust and mineral scale from equipment and manufactured components. Construction and Plant Hire. Removal of concrete, mortar and plaster from mobile and static equipment, scaffolding, scaffolding clips and brickwork. Why choose Enov StoneClean Multi Purpose Acid Cleaner? Enov StoneClean Multi Purpose Acid Cleaner removes cement and plaster splashes - ideal for initial cleaning. It cleans and etches concrete floors, ensures effective 'key' for seal application. Enov StoneClean Multi Purpose Acid Cleaner removes industrial grime and stains from brick and stone exterior. It descales and derusts metals prior to painting. Mechanical Maintenance. Removal of rust from equipment and components. Leisure Centres. Removes residues of scale and body fat from around the water line of swimming pools. Whe