I thought I was in trouble with spots on my rails. Only had the toon for 6 months, but have had it in the water since delivery. Had cleaned things the weekend before and all of a sudden noticed a cloudy hard spot film on almost all my outside rails. I'm that crazy about keeping things clean, so I went to work. Tried degreaser, hard water spot remover, vinegar and water (the kids loved that smell

) and finally found the fix.
I'll get pictures of the finished product, but this was the magic ticket. Now, I can't feel my fingertips and my nails and cuticles are grayish black, but everything is right in the universe. If anyone doesn't mind a lot of elbow grease, I highly recommend this (very expensive) product. Everything else I found, including my magic Meguire's cleaner wax didn't do the trick.