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Show Paint for the Exhaust. Ordinary paint or en?.-mel cannot he used on the exhaust, as the heat quickly destroys the coloring matter. Here is a recipe" for a paint that may b used on this part of the mechanism: Take two parts of black oxide of maneanese, three parts of graphite, nine parts of fullers' earth and a pint of sodium silicate solution. so-lution. These ingredients are mixed with water until they have assumed a consistency con-sistency so that the mixture fan easily be brushed on the parts. Care must be used that no rust is present on tiie surface sur-face to be treated. |