I tried my hand at a "Artist Trading Card" last night. I was given a pack a little while ago, and decided to see what they were all about. These two sites will give you a pretty good idea:
Above, you can see the card after my initial ink drawing on Saunders Waterford 300GSM CP paper, and then the finished product tinted with artist's watercolours. The linework was done mostly freehand with a 0.2mm Rapidograph and sepia drawing ink, with a ruler for the borders. I trained as a Cartographer before AutoCAD took over, and used to be very good with a technical pen, but as you can see from the first image, I am well out of practice! My smooth hand is gone and every shake is recorded on the paper.
My goal now is to make a complete set of cards with a different illuminated letter of the alphabet. :)