Tape off the surrounding area with plastic. Cover counter tops, cupboards and other surface to protect them from over-spray.
Wash the entire range hood thoroughly with a household degreaser to remove any dirt and grime. Go over it again with a mixture of ammonia and water to get rid of any residue that is left over.
Sand the entire range hood with a #150 fine grit sandpaper. Make sure to remove any gloss or shininess from the range hood to create a surface that paint can easily bond to.
Spray paint the entire surface with a lighter cream-colored primer meant for metal. Use short even strokes to ensure smooth coverage.
Tape off the "stones" using small strips of painter's tape, cut down to about 1/4 inch wide. Secure it to prevent leakage underneath it.
Spray paint a light golden color, meant for metal, over the entire surface. Let dry thoroughly about one to two hours or according to the manufacturer's instructions.
Apply a glaze in a darker golden color. Roll it on with a small paint roller and then quickly brush some off with a soft sponge. Repeat this step until the desired look is achieved.
Allow to dry to the touch for about five minutes before removing the tape to see the finished limestone look. Allow to dry for a full 24 hours before using the range hood.