Spray Star brite Rust Stain Remover directly on surface to be treated. Let product work until stain is gone before rinsing area with fresh water. Deep stains may require a second application and light scrubbing with a brush or cloth. To help prevent future rust stains, apply a protective coating of Star brite Polish to cleaned area to seal surface pores. Avoid contact with fabric. Test area to be cleaned for colorfastness in an inconspicuous area before proceeding with overall cleaning.