For the past 11 years, Sunnyside has been a manufacturer of safer paint and varnish removers, lead paint abatement products, and exceptional cleaning products. Our products are environmentally safe and contain no methylene chloride or other harsh, flammable, highly toxic solvents. Rust Remover is an environmentally friendly, water-based, biodegradable, non-flammable remover of rust spots and stains. Rust is the result of a chemical process called oxidation and can stain anything it touches. Rust Remover is non-corrosive and does not contain phosphoric or hydrochloric acid. It removes most rust spots and stains from interior and exterior surfaces including concrete, toilets, sinks, bathtubs, appliances, clothing, upholstery, metal, wrought iron, house siding, sporting goods, and more.