You can buy retail two-part epoxy paints, but maybe not in a wide choice of colors or container sizes. Ones I know of for sure are gray commonly used for garage floors (maybe only in gallon and up sizes) and white in nice small sizes, used for refinishing bathtubs and such.
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Another great coating is (single-part) polyurethane - very tough and nice finish - same as used on hardwood floors but with solid colors available. Use only solvent-based kinds for this.
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Ed
