Very interesting... extremely high gloss finish... I really can't say what the material is.. Is this a silver powder acrylic you are testing...
In all honestly, I have to say that although this is a beautiful pen, I don't like it as much as some of the others you have been doing recently... I think that if I was going to use silver I would either want it to be the base color of the casting with maybe some black or gray running through it or the other way around...There is something about the poweder coated look that I find disturbing..
OF COURSE, this is coming from someone who has never cast a blank and may never get one right if I tried...