Brake Drum

Here is the brake drum from the axle.  This is the first step in making the plaster mold, I have partitioned of two portions of it and will pour those parts first.  You can see the black plasticine that I use to seal the edges, some people  use clay but I prefer the plasticine.  I found that clay does not stick to the metal as well as the plasticine, especially when a reales agent has been applied.  The clay also caused some problems on the larger objects.  Because the prep time for the larger objects can take a long time I found that the clay was drying out,  shrinking and letting go of the object.  Even though the plasticine is quite a bit more expensive it saves a lot of time.