I have turned them and they have 2 flaws in my opinion. 1) They twist at the top and the clip twists with it which can create a scratch in the blank. The clip needs to be adjusted so it doesn't touch the blank. 2) The black rubberized coating rubs off very easily. I use a wire wheel to remove it all and then paint those parts with enamel paint and bake them. Once I get a powder coating system I will use that. Other than those 2 things, they are nice pens, nice size and nice weight. I hope that helps.
Typos courtesy of my iPhone