Switch off the electrical power to the table saw, and unplug the tool from the wall outlet.
Scrape the cast-iron surface with the edge of the putty knife to remove the heaviest built-up debris. Hold the blade of the putty knife at a 45-degree angle to the surface.
Pour a small amount -- 1 to 2 oz. -- of mineral spirits on the cast iron table, after opening windows to increase ventilation. Scrub the area with a green buffing pad in small circular motions. Clean the cast iron in small areas, working outward until you have cleaned the entire table.
Pour a small amount of mineral spirits into a cotton cloth. Wipe down the surface, removing all signs of rust and worked-up debris. The cast-iron table should now have a bright shine. If areas still have a small amount of rust or other material, work on that area again.
Wipe the surface down with a clean cotton cloth to thoroughly dry. Apply a liberal amount of paste wax lubricant to the cast-iron table. Let the wax dry to a light color. Buff the surface with a clean cotton cloth.
Add more layers of the paste wax lubricant as desired to produce a slick surface. Depending on how you use the table saw, reapply the wax as often as every month.