Wash your silk screen with a liquid detergent and a soft scrub brush, if the screen isn't already clean. Rinse it thoroughly, and let it dry for an hour.
Attach your stencil. If you have a cutout stencil, attach it on the flat side of the screen with a small piece of masking tape in each corner. If you are using a green film silk screen stencil, follow the manufacturer's instructions for applying the stencil to the flat side of the screen.
Wash the flat piece of stainless steel with liquid detergent and a soft scrub pad. Make sure you remove any oily residue. Dry the stainless steel with paper towels, and stand it in a sunny area for about 30 minutes.
Spray paint the front and back of the stainless steel. Allow 30 minutes of drying time for each side. Coat both sides a second time. The spray paint seals the steel, protecting it from rain and snow if it placed outside. Let the steel dry for two hours before printing.
Lay the stainless steel on a flat surface, and place the silk screen on top of it with the flat side facing the stainless steel, lined up carefully where you want the image to appear.
Squirt a line of oil-based block printing ink all the way across one side of the silk screen. Put the line of ink about an inch away from where the silk meets the wood.
Place the squeegee against the edge of the frame where the ink is located, apply light pressure and pull the ink across the screen. Lift the squeegee once you get to the other side. Put the squeegee against the frame edge on that side, and pull the ink back across the screen. Lift up the screen, and let it dry.
Clean the screen using liquid detergent. Dawn or Palmolive work best for cleaning out the oil-based inks. Attach the second color screen if you have one. Add another colored print after the first color has dried for 24 hours.
Leave the finished print to dry for 24 hours. Coat the printed stainless steel with two coats of clear spray paint. It will seal the whole design.