ICT 850-1GCASE Total Rust Eraser Concentrate 1 Case. ICT Total Rust Eraser Concentrate (850) is a heavy duty, concentrated rust and stain re-mover. ICT Total Rust Eraser removes rust and other surface contaminates from a variety of surfaces including natural and artificial stone, brick, masonry, concrete, travertine, flamed granite, stucco, and other similar surfaces without etching, pitting, or damaging the surface or grout.