I need to find out how to restore the color on my fiberglass bathtub. It use to be white and now it is yellow. I have a problem with hard water stains also. I know there is a product on the market to paint the bathtub with. Will this work and will my bathtub look painted if the product is used. I also have a few chips in the fiberglass also, what do I use to repair the chips. By the way, the bathtub is 17 years old. These are the only problems I have with the tub, and I dont really want to replace it unless I have to.