[cfuruti]

Trivial tips from a humble baboonic fellow:

• rockpaperscissors's right: since laser pigments, unlike inkjet inks, don't penetrate paper, they easily flake off when handled. On the other hand, inks are more damaged by humidity, thus the coating advice
• therefore, plan ahead and minimize part handling; score fold lines while each part is still attached to the sheet, so you can hold the white paper, not the part
• use tweezers as much as possible, and keep your fingers free of sweat (in hot weather I keep baby talc at hand)
• is it a preprinted model? If not, try printing tiny parts in thinner paper. Sharp bends in thick paper stretch fibers and contribute to flaking/cracking the surface.