Recent content by Greg in MO

@Watercolorchild : The last two posters are on the right track. Here is some more detailed info from a post I made elsewhere. Some of it may not pertain to your keys, but it may. Your keys will be metal, and they will be heavy (the tin / bismuth density is bit more than steel). This special...

There are a lot of books for sculptors that describe working bronze. If you are near a college they may have a bronze work class for their art students that you could audit. Are you wanting to cast it? It's not easy because of the temperatures involved. It may be wise to first get experience...

I don't think that CFM is very important in these cases... The pressure/vacuum pots (chambers) in these pictures are not that big. If they are only 1 cubic feet capacity, then a big 4 CFM set-up would fill/empty it in 15 seconds. While a tiny 1 CFM set-up would take 1 minute. For most resins...

Hello Hydin - this thread is pretty old, but if you are still looking for a solution... For your item a flexible silicone mold could be made, and then a metal cast of low melting temperature Tin / Bismuth can be made in it. Multiple casts actually. Here is a link to the material - I recommend...

Thanks mslz22, I really appreciate hearing about a material that has survived the concrete bounce! I went and read the Smooth-Cast page you linked me to. Looks the right kind of stuff. It even says it was designed for rotational molding. I do have a molding and a curing question: 1) Does a...

Thanks Locry. There are no protrusions. I looked up the "blue and red dummy guns" you mentioned and they are comparable to what we need to make. Fiberglass would be strong enough, but I'm having a hard time picturing how to hollow mold a small handgun-shaped item with it. Perhaps lay up part...

I've been reading through the past posts, but have not found a discussion dealing with this. I need to make replicas for a training program, but they need to have approximately the same weight as the metal originals. I can't say what they are replicas of, but if you picture a common handgun you...