My wife actually helped come up with this one. We were reminded of our grout problems in our shower when we saw a display in the Mall of these fiberglass tub covers. They just slipped over the exsisting tub. My wife hates cleaning the tub and I hate the idea of replacing the grout. The tub slip covers were kind of ghetto, but my wife said they were like truck bedliners. That's when it hit us. Why not just hose down our tub and tiling with those spray on bedliners like Rhino offers? Neccessity really is the mother of invention.