Work on the 1:35 SU-122 continues as I try to replace some missing parts thru squash casting. Squash casting is a technique to reproduce simple parts using a one-part mold. Here's a link to where I first learned about it. For the 1:35 Tamiya SU-122 project, I realized that I had lost 2 viewport hatches for the tank destroyer's superstructure. Luckily though, I found one of the three hatches and decided to try squash casting replacement parts.For this attempt, I'll be using an A/B epoxy putty for both the mold and the replacement part. Depending on how it looks, I might try a different material later on such as glue-softened sprue plastic. Anyway, I mix a batch of the putty together by kneading vigorously the resin and the hardener components and roll them into a cushion-like ball. After the colors had evened out to a neutral color, I split the blob into two and use the plastic hatch part I have left to create an impression on one side of the balled-up putty. ...