White vinegar and baking soda can be used to clean acrylic bathtubs. Vinegar and baking soda can be used individually or together to help remove soap scum, stains and water spots.
A paste of baking soda and white vinegar can be used to help remove deep stains on acrylic. Mix together baking soda and vinegar to create a thick paste. Rub the paste on the stained acrylic and allow it to sit. Scrub the paste away with a soft brush and rinse the acrylic thoroughly. Another way to clean an acrylic tub is by spraying the tub with an equal mixture of warm water and white vinegar. After spraying the tub, liberally sprinkle it with baking soda. Allow the baking soda to sit for several minutes and then scrub the tub with a soft brush before rinsing.