Zud Rust and Stain Remover - 6 oz Can
Powerful efficient cleanser - easy to use.
For use on porcelain, toilet bowls, fiberglass, etc. - will remove most hard surface stains - but use with care as abrasives in the compound can scratch some surfaces.
Works effectively without scrubbing when simply applied to stain area as a moistened paste.
Prime ingredient is oxalic acid.
Contains no phosphate.