ScaleAway

Scaleaway is an inhibited acid descaler formulated to remove cement trailing, rust marks, and hard water scale from metal surfaces. It helps restore cleaner surfaces by breaking down mineral and rust-related build-up while supporting more controlled cleaning on suitable metal applications when used as directed. 

Dilute with 10 parts of water. First clean the surface, then wet with water and apply a suitable solution of Scaleaway. Allow a minimum contact time of 5 - 15 minutes for product to act. Scrub with hard bristle broom and rinse well with water