Well walker, it has the potential to work. HOwever, you will run into 2 problems, and others I'm not thinking of probably...
First, the fact that pastels are very fragile, will make it very difficult to make a fine enough point to fit into the gap of the panel line...second, after you color about a quarter of an inch, you will have to sharpen it again...because pastels are soft, and the point will wear down very quickly.
I'm sure there are other things that will make this more trouble than it is worth...it was the first 2 things I ran into when trying it, and I didn't bother to go any further (I tried soft drafting pencils and "click" lead pencils as well...they all just never gave me a dark enough line)...I just practiced the wash, and finally got it. If you read the tutorials on washes, FOLLOW THEM EXACTLY, you will eventually succeed! Just be patient, though I know how hard that is!!!