Pretty self explanatory. We've got a lot of discoloration on our vinyl step. 1998 Coleman. It's weird as it seems to come and go a bit, depending on whether it's in use with the sun beating on it, or in the up/stored position. When stored it gets brown all over it. Washing it does nothing, but the sun seems to bleach it back out. Anyway, I'm thinking of replacing the entire floor and the step as well. The step looks complicated with riveted side panels. Anyone done it?