Today I tried to remove the Color at Vertices property from a model through hex editing. I overwrote all the CLRL blocks in the .msh with 00 strings. After I saved it, the property was removed from some of the model parts, however, other parts disappeared. They were not visible ingame (although the collision was there) neither in Unwrap 3D, which I use to view models. Actually, the missing parts weren't even in the hierachy's list.

So, is there a way to remove Color at Vertices through hex editing, without making model parts disappear?

You can cut out the entire CLRL chunk, and resize the SEGM, GEOM, and MODL it is under/associated with. Then resize the HEDR and MSH2 as well. I've done it this way several times now, and haven't any issues yet.

Great! After some cut and paste I managed to do it. Thanks again AQT.