Upholstery: Combine one fourth cup dishwashing liquid per one gallon water. For deeper stains, combine one fourth cup dishwashing liquid and one cup bleach per one gallon water. To remove suntan lotion: apply cornstarch as an absorbent, remove excess with a straight edge, clean up residual with dishwashing liquid and water.
Metal: All powder coated products should be cleaned with either a soft cloth or soft-bristle brush, using a solution of mild anti-bacterial soap and (preferably warm) water. The best type of soap to use for this purpose is one that has emulsifiers that can break down the most common types of stains, like a pH-neutral liquid hand-dishwashing detergent. Exposed surfaces of powder coated products that are deemed the most critical should be cleaned regularly (on either a weekly or a bi-weekly schedule). These can be wiped down and rinsed with filtered water.