Dave; Here's the important parts of the thread that I saved for my own reference;
I use Gold, FW Acrylic Artists Ink (water soluble) with a calligraphy pen (standard quill handle and a nib), the nib reads; Hunt Globe Bowl Point # 513EF. I got the stuff at a local art store. For Black, I use the same setup with Black India Ink. (hotfootTG)
I use a .02 Rapidograph technical drawing pen and same manufacture ink. In my personal bows I will use gold leaf, but the stuff is waaay too expensive to use on run of the mill refinishes. Droptine (Rich Lopez)
Look for this: Edding 780 Paint Marker Pen - Extra Fine x 1 Gold "Superior Quality Marker Pens containing Metallic Paint! Great for use on Metal, Rubber and some Plastics - Also great for Crafts! They show up particulary well on dark surfaces and with the extra fine nib, you can use them, more or less, like a normal pen!". Pilot makes these metallic fine point pens too. (Tony W)
Al (Als Decals)