with Urethane Castings
Castings should be thoroughly washed before
painting. Mold release is used to prolong the life
of the molds and will cause paint to adhere poorly.
Use warm soapy water or a mild sink cleanser. Rinse
in warm water and air dry.
Do not apply heat to dry PARTS or use VERY hot water
TO WASH. Urethane will soften and distort if heat is
Castings may need to have some flash, parting lines
or sprue marks removed. A hobby knife and sandpaper
works well. The urethane cuts and sands easily so
use care. I prefer to wet sand. Use wet/dry
sandpaper (320 through 600 grit) and keep the paper
wet while sanding. Using water lessens the chance of
scratching the castings and slows the cutting action
of the sandpaper.
Even though every effort is made to provide a
perfect casting some filling of imperfections may be
required. Iíll wash the castings and spray a light
coat of automotive primer on before inspecting and
cleanup. The gray primer makes any imperfection
highly visible and also provides a base that body
putty can adhere to. After filling, the putty can be
sanded down using wet/dry sandpaper as described
After the castings are finished to your liking they
can be installed using slow setting cyano-acrylate
adhesive or epoxy.
Remember that cyano-acrylate type adhesives usually
bond urethane resins INSTANTLY! Slow curing types
will only give you a slight increase in time to
position your parts.
your Short Wagon into a one or three box wagon
Converting your short wagon into a one or three box is
very simple. "Box"
referred to the hauling portion of the wagon. If
there were one set of side planks making up the box
it was a "one box", two sets a "two box" and three
sets a "three box". Often these planks were
removable and a removable seat was hooked over the
planks. This allowed the wagon capacity to be
increased or decreased as needed.
Removing the top most board of the Left and Right
Sides quickly changes it into a one box. Use
an X-Acto knife to score the Side Wall castings
between top and second side board. Score vertical
posts at the same points. Score on inside and
outside of walls and gently break away top board. Do
the same for the Front and Rear panels. Clean up the
edges with fine sandpaper. Cement a short strip of
styrene inside each of the side walls. Size and
location of the strip should be the same as the
original ribs on the top board you removed. These
ribs will form the mount for the Seat Supports.
Finish assembling the box and install the seat per the
If you want to convert your wagon into a three box,
fabricate additional boards from 0.040 thick
styrene. Eight to ten scale inches in height is
appropriate. Fabricate posts from 0.020 x 0.040
styrene strip. Don't forget to make a front plank.
See the pictures below for some idea on how to space
the posts. Add two strips horizontally inside the
walls for the Seat Supports to rest on. In the case
of a temporary three box arrangement it appears that
the teamster simply rested his feet on the front
plank as the foot board was not moved up.
Click Here for a Harnessing
Instruction PDF and
Click Here for photos of the Long Wagon Prototype