If you know of some such mix of inexpensive, easily produced
modeling compound I'd really like to hear about it.
Here is a formula from " SCULPTURE " by Wilbert Verhelst.
5 quarts 30 weight motor oil
5 lbs. medium weight grease
20 lbs. microcrystaline wax
50 lbs. fine powered clay
First heat the oil, grease, and wax to molten. slowly add the
powdered clay. A good stirring device is a heavy duty 1/2" drill
motor with a mixing blade. If the clay is too hard, add a little more
heated oil. If the clay is too soft, add a little clay. Pour the hot
clay into small greased cardboard boxes.
I would ask in the community for donations of shelf worn oil and
grease . Also get several 5 gal metal buckets, or better a surplus 30
gal grease barrel .
When small lots get dry, they get hard. Vaseline or mineral oil are
good clean ways to refresh the clay.
With hot oil use GREAT CAUTION .
Consider cotton pants & shirt, with rubberized slicker suit pants and
top . A rubberized apron and face mask completes this picture.
In the predawn of the industrial age I used to heat large bearings
100 lbs. + suspended in 50 gal. pots of boiling oil . This was the
safe way to heat the bearings to expand them for assembly . NOT the
safe way for people.