About how many sq ft will a gallon of slate black cover on cold rolled steel?
Slate Black Patina is a versatile black finish for use on most metals. On iron and steel, it will produce a black patina with some brown showing through the finish. This is a fast 3-5 minute reaction that is arrested with water. Additional coats will darken the patina. Slate Black Patina can be diluted with distilled water for lighter coats.
Slate Black Patina will darken bronze, brass, and copper in a similar way. On zinc and galvanized steel, it will produce a dark brown to black patina. On aluminum, it must be applied hot (180-200°F) and will create a brown finish. On stainless steel, it must also be applied hot and will produce a red, black, and brown patina.