There's tons of youtube vids on casting, and if you look at the guys that post restorations vids on old tools such as Axes and really old parts, they have a lot of methods on restoring parts you simply will never find. Casting is VERY interesting. There's one vid of a car enthusiast that creates a funnel / exhaust pipe for his car using similar methods to Daniel's process. Trust Dan to try something this difficult, and achieve the desired result. Great work mate !