I know I figured out a trick for bleed through like that in the past, but I forgot what it was. Either A blank sheet of thick white paper that won't let light through behind it, or dark construction paper, I think. I don't remember which worked better.

Most scanners have a glossy white backdrop that reflects light back through, revealing any flaws in the paper as shadows, as well as anything in the other side. You need to diffuse that.

Thank you. I'll have to try that. ==:> )

I have not drawn in years, so I don't actually remember clearly what worked and what just made it worse. Experiment a bit with putting different things behind the paper with the image on it, or even keeping the lid open with the paper held flat.

I recall messing with brightness and sensitivity settings and then darkening the lines again digitally afterward as well.

... now, if Only I could remember how I made blue lined paper lines magically disappear ... I figured that out once as well, but then forgot how I did it. *shrugs*