Certain plants provide strong solvents that can replace traditional chemicals in tough cleaning applications. One of the toughest cleaning jobs is graffiti removal. Most graffiti is done with solvent or petroleum-based paints; for years, petroleum- or chloride-based cleaners were used to clean them.

But biobased graffiti removers, which contain soy, corn or citrus derivatives, are touted because they are biodegradable, safer for workers to handle and wash clean away with water. These products perform comparably to traditional removers but leave less of an impact on people and the environment. They can also remove stains from pens, markers and other inks.