Interior detailing involves a deep cleaning of the whole interior cabin. Automobile interiors of the last 50 years have a variety of materials used inside the cabin such as synthetic carpet upholstery, vinyl, leather, various natural fibers, carbon fiber composites, plastics, and others. Different techniques and products are used to address cleaning these. Vacuuming is standard, and steam cleaning, liquid and foam chemicals, as well as brushes may be used to remove stains on upholstery. Some nonporous surfaces may also be polished.