It should be titled "Erasing". I've just finished the part...^^;
It's assistant's job if you have. I'd loved the erasing work when I had worked as an assistant, cuz there was no responsibility of drawing. You didn't need to be sorry for your bad skill. Or no struggle to do it, just rubbing. (Unless you don't crease on the paper)
Now - I hate it. It's just hard, there you don't have the slightest fun.