cleaning fiberglass tub
How to Clean a Yellowing Fiberglass Tub | Hunker
How to Clean a Yellowing Fiberglass Tub Fiberglass bathtubs may start to turn a yellowish color as a result of soap scum or hard water. These stains can be very difficult to remove. However, a mixture of cream of tartar and hydrogen peroxide will easily remove any stain and restore the tub to its original white color. I'm going to try this on my ugly yellowed tub anf then submit the results.