Hi,
I first want to thank RA for letting me join your forum. I was reading the post about "Best Resin for Pressure Casting" and was quite impressed my the knowledge of the people. That kind of knowledge seems hard to find from what I have experienced so far. I have been making knobs and other small parts for old cars for the last 3 years.
I am now making a mold for a steering wheel that is 18" in diameter. I am planning to cover half of the steering wheel with clay and then pour the first half of the mold using silicone rubber. I intend to degass the silicone and pressurize the pour while it is curing. My question is will the pressure tend to somehow distort the finished mold because of the clay? Someone told me that I might be better off to not pressurize the pour while it is curing. He said you don't need to pressurize because the bubbles in the silicone will all rise to the top of the mold and not cause a problem. I was going to insert a picture of the mold but I don't know how to do it. Do you use the "Img" button and if so how? Thanks for your help. Rob