How do you get rust stains out of a fiberglass tub?
How do you get rust stains out of a fiberglass tub? In a small bowl, make a thick paste of baking soda and white vinegar. Apply to the stain and allow that to sit for a few hours. Before rinsing, rub the stained area with a stiff scrubber like a non-scratch blue Scotch-Brite scouring pad. Rinse.