I have had no small amount of experience using these materials, on boats and vehicles, in severe environments and mundane. My sons and I built an offroad 4wd hummer type truck from a kit and covered the entire thing top to bottom inside and underside, with Gator Liner. That was 5 years ago, it has NEVER been washed and has been ran through the worst imaginable terrain from south Texas to South Dakota, mud, sand, gravel, you name it, you can walk on the hood and not leave a scratch, it's tuff. It's also difficult to apply and any nonpouros surface must be VERY rough and etched or it will peel. I have used Sanitred on my boats with great success, it looks good and is easy to apply. It is a little rougher than some like if you use there rubber granules. If you use course sand or ground walnut shells it's not so aggressive. If applied over plywood or a pourose surface it sticks like baby s#$t to a blanket. It will not fix deck cracks or leaks on a long term basis, as it will eventually crack along with the substrate, in other words, it is not a fixall method, no matter what the sales person says. It will get nasty looking after a few years but just pour a few gallons of styrene or acetone on it then rinse and it looks like brand new. Regular washing with tsp will keep it from getting grungy looking. It is a close to no maintenance as you can get, even Bonita blood won't stick to it. It ain't cheap.