I'm in the process of creating some metal master models for casting.
These models are etched and engraved. Under even the most controlled
situations etching can produce some surprises. I need to patch a
pinhole hear or there and in the areas where a line or edge was
lost, I need to build this back up and re-sculpt it.
The dilemma is that the material I use to fix these imperfections is
going to determine what type of molds I have made from the models. I
need to choose between vulcanized molds or silicone. Even though I
will lose some size, I preferred vulcanized rubber because it is
stronger, but if I use wax as my patching agent, then I will have
to go with silicone, which may break down in a few years causing me
to have to pay for new molds for all of these models again, and
there is quite a few. I also tried using soft solder, but it didn't
allow me the control I require.
So the question: what do any of you on-list suggest I use as a
patching material for copper models?
Thanks all for reading.