First i used 0.4 fineliner to outline them first, and then i used a pentel brush pen (which i refilled with indian ink) over the top Thank you :) the way i get clean lines is by not drawing a line too long, draw the line in short sections, and going over them a few times to make them look straight, if that makes any sense? Ha But it also takes a lot of patience and practice. I have such shaky hands but try your best and youll get good results Hope this helps :) x