Thanks for the suggestions, everyone. I’m not sure about the type of lamination. He just had it done at Kinkos, and the laminate seems quite thick to me. The sheets are more rigid than typical laminated posters and stuff.
I have about a bajillion ultra fine point Sharpies for, um, Georging, but I don’t really like the idea of lugging around a special solvent. Although . . . I do have these awesome alcohol swabs I got from Surpie. They’re like moist towlettes, but moistened with alcohol instead of . . . whatever it is that moist towlettes are moistened with. Ah, anti-static wipes. I used to use them to correct mistakes made with permanent overhead markers, back in the day before reliable Powerpoint availability, when you had to do talks on transparencies. I wonder how many of those I have left? Maybe I should stock up while they’re on clearance.
I’ll do a side-by-side test with some wet-erase markers and Sharpies w/ towlettes.
I’ve got some china markers too, which are excellent for making a durable mark that wipes off easily, but they’re really too blunt for this application (you have to write legible numbers in small score boxes), and I don’t want to mess around with sharpening. Fine point grease pencils seem like such an obvious thing—they must be impossible to make, or else someone would be selling them.