I painted my cast iron tub a few months ago with oil-based exterior white enamel paint. It looked great at first, but now it's starting to turn more of a cream color.
Thinking it was just dirty, I hit it with some "Soft Scrub with bleach" and it didn't help. Is the paint yellowing, or is it something in my water? I have old galvanized pipes through the house and it is a bit rusty, but all the paint seems to all be the same cream color, even areas that aren't ever directly exposed to water, only to steam.
If it is the water, is there some sort of urethane clear coat or something I can spray or roll on that will hold up to the heat, water and chemicals?