Let's make the Mold Wet the rock or
lump of coal with a spray bottle of water with a drop or
two of liquid dish soap. The water helps the rubber to
get into the small cracks and detail. Dip the paint
brush into the liquid latex and "paint" a coat
of rubber onto the face of the rock/coal. When you have
finished painting the face of the rock/coal (a mold
about the size of your hand is much more manageable than
a larger one.) Wash your brush and allow the rubber to
dry according to the product instructions (usually about
24 hours.)
You can speed the drying time by using a hair
dryer on the "warm" setting - do not use
"hot". As the first coat is drying do not be
concerned if it turns almost clear in color. When
the first coat is dry, "paint" on another coat
of rubber directly on top of the first coat. You will
not need to put water on the mold for this or any
following steps. Wash your brush and allow the rubber to
dry.
When the second coat is dry, apply a third coat as
you did the second coat. Wash your brush and allow the
rubber to dry.
When the third coat is dry, apply a fourth coat
and immediately press some gauze or pieces of old
pantyhose into the wet rubber and immediately apply a
heavy coat of rubber onto the gauze/pantyhose. Wash your
brush and allow the rubber to dry.
When the rubber is dry gently peel it off the rock
or coal and you have a mold, ready to make rock detail.
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