The paint marker is silver, extra fine point. I got a gold and silver one from a local art supply store. I got Sharpie brand first, but they both stopped working.
I got the center finder at Woodcraft. Isn't it cute? It's functional, too, and the perfect size for pen blanks.
http://www.woodcraft.com/product/158247/woodriver-pen-blank-key-chain-center-finder.aspx