I've built a couple of things with laser printed parts and did not find cracking to be an issue nearly as bad as that of plain spottiness which, since I'm not a printer engineer, I can only guess are drum issues (shhh!, it was the office printer). I have been using the home b&w laser printer to print out things I intend to paint over, prototypes, paper I've silvered and structural parts to save on the inks. I have found that a coating of Krylon matte fixative (used to protect sketches in pencil and pastels) prevents flacking and provides some protection from the scrapes that comes from part handling. There's a version that provides UV protection, but I haven't used that. A wide collection of felt tips or artists color pencils can also help fix/disguise problem spots.
I also used my ALPS once to try it out, and well that did crack pretty badly and didn't like the glue, but then again it is wax based so no surprise there. Shame because those colors were pretty stable.