- Bathtub refinishing chemicals and automotive paints by Midwest Chemicals. As the largest bathtub refinishing company in the Midwest, we have developed the best chemical coatings in the industry. We refinish hotel bathtubs across the USA, specialize in refinishing claw-foot bathtubs and sell paints, coatings and custom chemical formulations to the automobile, marine, industrial and trucking ...www.midwestchemicals.com