What paint for the metal pan in our stand-up shower? Previously used Klenk's Epoxy Enamel Tub & Tile Finish. Lasted a number of years, but finally peeled in places and we had to strip it all off. The Klenk's finish was somewhat slippery; the original stripped-down pan is not. Apart from a suitable paint generally, is there something that also offers a non-slick finish? Or, is there something to mix in that will make the finish non-slick?