Machine Paint for covering castings and various machines is frequently required. It should resist grease and stand a certain degree of heat without showing defects. Such as the following steel color.

25 pounds of French zinc, (in oil), 1 pound of lamp black, (in oil), 5 gallons of good Japan dryer, (gum base). To reduce the body, if too heavy, add a little turpentine.

Paste paints to be used on machinery and various iron and steel articles are made from a base consisting mainly of barytes and Paris white, with the addition of 1-4 to 1-3 of white lead and zinc, colored to suit. The pigments should be ground in a mixture of 1-2 raw linseed oil and 1-2 liquid dryer as such paints are used flat.

Various asphaltum varnishes are largely used as metallic paints, and if properly prepared, give good results. Ordinary asphaltum paint is simply asphaltum dissolved in benzine, or melted and reduced to a paint or varnish body with this diluent. Such a paint has little virtue, except that it is very cheap.

Good asphaltum paint should contain plenty of linseed oil, which adds greatly to its weather resisting and protective qualities. Ordinary asphaltum prepared for use may be much improved by the addition of 2 gallons of raw linseed oil and 1-4 gallon of good liquid dryer to each 10 gallons of the paint in question.