come on chicken don't be a goose ( I'm joking) that technology has only been around for about 20 years so how on earth would you expect anyone to know about it??? It so old to be uncool now with masses of other product out there with fancy names . I can tell you from my experience if you don't get the advice and select the right product at lowest capital cost that is suitable you can't afford top change trains after only a few years production so you have to commit to the right technology and decide to cast or mill or powder and bake or mould from day one . Because they are low stress and low heat due to oil cooling there will b a suitable low cost option that will perform suitably. They could hard bake some papier mache and spray it with hairspray to keep it waterproof and
some tin foil reinforcement
