ruling pens. I watered down some fluid white titanium Golden's paint and it worked really well! In this picture the white paint is still wet so it looks a little shiny here. Anyway...if you are having the same problems with your art journaling- get yourself an old fashioned inking pen. I found a place here to buy them.
Inking pens were used in drafting once upon a time...along with a ruler to make wonderful inked lines. I have one that I purchased from Jonathan Talbot and I have another one that was my father's when he was in college, as part of a set. He went to collage when they used a slide ruler. to do the calculations..which I have no idea how to use.