Kfir Azran at SURFACE INTEGRITY demonstrating a typical case of stain removal from an Acrylic bathtub surface.Permanent stains on your beautiful bathtub ca Acrylic is a non-porous material, which means that it will not absorb any excess water in your bathtub. This non-porous material also helps with heat retention, keeping the water in your tub warmer for longer. Kohler Archer Lef Drain Alcove Bathtub. As with every bath material, acrylic tubs do have some drawbacks. Boil a kettle of water and pour it into the drain. Follow it with half a cup of baking soda and leave it for a couple of minutes. Add a cup of vinegar and a cup of boiling water – it will activate the cleaning properties of the baking soda. Let it rest for 10-20 minutes. Pour the remaining water down the drain. This will create a bubbly cleansing foam. Scrub the bubbling vinegar and baking soda into the stains and the surface of the sink, allowing it to sit for about 20 minutes. Then, rinse with cool clear water. If the stains remain, it is worth making a paste of baking soda water and allowing it to sit on the stain before attempting to scrub it again. Leave a couple of inches of water in the tub before spraying it and then let it sit for 20 to 30 minutes before wiping it down and rinsing. This quick and easy method works well and is inexpensive. Be sure to use a soft cloth. Another easy way to clean a tub is to use a mild dish soap, warm water and a sponge. Here are the best acrylic bathtub cleaners to use: Better Life Natural Tub & Tile Cleaner. Wet & Forget Shower Cleaner. Soft Scrub All-Purpose Surface Cleanser. Clorox Bathroom Spray (Bleach-Free) Clean Shower Daily Shower Cleaner. Arm & Hammer Scrub Free Bathroom Cleaner. 409 All-Purpose Cleaner Spray. The easiest way to restore the finish to an older tub or shower is by using a refinishing kit, together with a small roller and a small foam brush or varnish brush to reach areas that aren't accessible with the roller. Use a wooden paint stick to stir Part A and Part B separately. Then add Part A to Part B and stir the mixture for two minutes. Using Natural Products 1. Fill the tub with hot water and vinegar. If your acrylic tub is heavily stained or dirty, consider filling the tub 2. Sprinkle the tub with baking soda. Sprinkle baking soda all over the tub while it's still wet. If you didn't fill the 3. Scrub the acrylic tub. Dip a Bjme.