Really cute quilt. I have tried the pigma pens but find them too scratchy and don't give a nice finished look. You might want to try the Millennium Collection available either at JoAnns or Michaels. They are pigment ink, acid free, waterproof and non-bleeding. You can usually buy just 1 pen, but I got a set of 8 colors for about $13 and they have a much smoother writing tip.