Why ME can't use some object liveries?

[Glow]

Hi. I made a livery for a Windsock, model name: H-Windsock_RW with a description.lua like for all other models.

All is working fine in ModelViewer, even encyclopedia is showing my skin on a windsock model. When I try to use ME, in PAINT SCHEME box there is only Default. My liveries are not shown. I had this problem with some other models too. Are those models locked from using custom liveries? What I doing wrong here?