52 comic challenges

This site sets you a challenge. Nice idea if you fancy creating something and need a starting point. I think I've already done three out of the five challenges currently posted.
http://52comicchallenges.com/
Here's a question:
What do you do when your paper is too thick to use a light box?
Lately I've been doing my inking on heavy paper (lightboxed from the initial pencil sketches) so I can paint on it. However, it's really hard to make out the pencil sketches, so it's impossible to use detailed pencil drawings.
This is one of the reasons why Some Forgotten Part was drawn straight onto the painting in ink, so I could do away with the pencils. But this won't work for every project. I used some carbon paper type stuff for 'The Creature' strip (written by Tony Hitchman), but this too had its own set of problems. I've also tried doing inks and paint on different layers, but this didn't work well for me.
I might try a cellulose thinner print and see how well it copes with paint.
Suggestions are welcome!