Last year the underside of my ttop was getting dirty and the surface was hard to clean. I remove the ttop sanded the inside surface and applied two coats of Interlux Pre Cote sanding between coats then i applied one coat of Interlux brightside blue mixed 50/50 with Pre Cote and finish with two coats of Interlux light blue color. The surface stays shiny and is very easy to keep clean and the light blue color keeps down any glare.
