Small Aluminum Skull Sand Casting

In this post I will explain how I sand casted an aluminum skull. This is one of my favourite aluminum objects that I've I casted, it turned out very well. I had this small cast skull on the shelf for the last 30 years I don't even know its origin. I decided to make an aluminum duplicate using it as a pattern. It took me three time to make the cope part but again it was worth it in the end. I also got myself a new buffing wheel and a brown polishing buffing compound (500g soap wax bar) for this project.
I also experimented by using only one sprue without a riser and it turned out very well.
After cutting the sprue I started with the polish proccess. First I used some sand paper and metal wool coarse and fine grades and after that I used my new buffing wheel with the brown polish compound. It didn't take long until I saw a nice shine glowing from the skull. After more polishing I could see my reflection on the skull and I am happy with that at the moment. Here are a few more images of the aluminum skull nice and shiny. I use it now as my paper weight and pen holder.