Worked real hard to get a good finish on my 69 V21, put Vertiglass and that other glass product on the first four years. Was happy with both but had to strip them after two years each because i did not like the finish. A chemist friend said they both seemed like a heavy duty floor wax like Mop&Glow. Put multiple coats of Mop&Glow on a hatch cover and left it out during the winter and it weathered real good. Just took my boat out and i had Mop&Glow on all summer on everything from rails up and with a wash the boat looks great. Will use the bottle up in spring and launch. I keep the boat on a mooring on Lake Michigan in Milwakee so i only get about five to six months use but that wax held up great. Wonder how it would take the sun and salt of a warm weather port. Sure can't beat the cost, two years for Four bucks. Just thought i would throw this out there.