Making a bolt with ZIGZAG threads SO STRANGE Lost PLA metal casting

In this video I will be making a bolt with unique zigzag threads. I started this project by 3d printing models in a plastic called PLA. Then I coated the models 10 times with a ceramic material called Suspendaslurry. After the ceramic shells were completely dry I placed them in my kiln and melted out the PLA plastic. At 1500 degrees Fahrenheit the ceramic shells became vitrified, turning into a ceramic that can withstand the heat of molten bronze. I melted the bronze in my homemade keg foundry furnace and then poured the liquid metal into the ceramic shell molds. This is similar to the lost wax casting process. Affiliate links to items used in this video Polishing Compound The best polishing wheels ever Overture 3d printer filament Some of my favorite hand files The die grinder I use Clear Coat I love this stuff NeverDull metal polish a