I have had my diamond shield replaced 3 times now and it still is looking bad. I have followed every example from diamond shielf to prevent discoloring, From washing every month or so, to using a bleach/water mixture to prevent mildew to using 303. None have worked. This product may prevents a few chips in paint, but the aggrevation is not worth it. diamond shielf wanted $400.00 to take off this last application they did or over $1K to put new stuff on. No thanks, when it gets to the point where I can't look at it anymore, I will take the time to get it off myself and never put this product back on. Had I known it was an inferior product I would never had it put on when I purchased my MH.