Tub Cleaner - vinegar and dish soap. Heat c white vinegar in m'wave for 90 sec, pour int spray bottle. Add c BLUE Dawn dish soap. Shake to mix. Spray on surface, let it sit 1 hour. Wipe then rinse with water. Should also take soap scum off shower doors.
How to Clean and Restore Shine to a Fiberglass Tub - spray allover with vinegar. Let sit for 30 mins. Sprinkle with baking soda and use a sponge dipped in vinegar to scrub it in gently. Rinse well to remove baking soda.