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I printed the parts with a 3d printer but still used a cardboard sheet. It made assembly easier and it worked fine. https://www.thingiverse.com/thing:2761314
Electrolytic Rust Removal Aka Magic
HDPE Blocks From Plastic Bottles
There are many mold release sprays on the market that would work. Some can be found on Amazon.
Welding Tools and Materials
Beginning to MIG Weld
I'm curious if your dark quarter made with the copper solution added could be polished to a shine or not and how durable the coating would be.
How to Lose 100+ Pounds and Keep it Off For Life
"Hook" Wooden Sword W/ Coconut Guard