After trying every cleaner out there (including the magic blue dawn and vinegar) with no luck, I tried on our textured fiberglass shower pan and it worked miracles! Spray, scrub with a nylon brush, wipe up with paper towels and then rinse. by morecerv.
It's been so difficult to find an attractive one piece acrylic or fiberglass tub/shower enclosure. Love the storage in this unit! A one piece enclosure appeals to me after once having a bathroom where the shower and tub seam leaked.