is required a colored paste or colored powder of a particular color can be selectively added the anti settling agent is bentonite silica in gaseous phase or activated polyamide wax the surface layer material is a polyurethane pu imitation porcelain surface coating comprising a major surface layer composition and a curing agent wherein the major surface layer composition comprises the following major surface layer ingredients by weight butyl acetate 6 xylene 5 acrylic polyol resin 82 7 propylene glycol monomethyl ether acetate 5 organic silica leveling agent 1 and organic silica anti foaming agent 0 3 wherein the curing agent comprises the following major curing agent ingredients by weight butyl acetate 20 xylene 20 and isocyanate curing agent 60 the ingredients according to the above weight ratio are mixed and grinded to obtain the pu imitation porcelain surface coating material which can be mixed with the curing agent or a thinner composition before use the weight ratio of the surface layer material the curing agent and the thinner composition is 1 0 3 u02dc 1 0 5 u02dc 1 the thinner composition mainly includes the following thinner composition ingredients by weight butyl acetate 3 10 xylene 50 60 propylene glycol monomethyl ether acetate 5 15 and isophorone 5 15 preferably and in particular the.