What do you use to erase pencil? The words "Using an eraser and a light touch" suggest a gum or a vynil eraser. I make a ball with the kneaded eraser and roll it with the palm against the paper.

I found myself using the Prismacolor Artgum eraser the most. It had a nice way of shedding the used parts and staying clean. I like the kneaded erasers too but I tend to dirty them up too much.

I use the Pentel Hi-Polymer eraser. Minimal abrasion of the paper, clean removal of graphite.