The core of this technique is the use of beeswax to act as both a filler/smoothing agent and mould release. A clever hack - but I'm confused by some things: - the assertion that 3d printed materials are not body safe; PLA (the most common 3d printing material) is nontoxic and used for utensils (although agreed that the layer lines are a hygiene hazard) - the description of the "traditional" method as printing a posit…
Utensils are (generally) not inserted. however more crucially in this respect, depending on the mix, silicon is more compliant. You want to have a bit of give. (I know I know, glass dildos exist, but thats a specific, advanced usage)