[OR 2021 R1 10.10] Uniting Meshes with different colors.

I've ran in to issue where I've created road signs that display properly in IFC but currently it's made up of several mesh elements to have it display different colors on single traffic sign. Question is is it possible to link it together in one IFC element but have it save the different coloring of separate meshes.

Example sign panel is made up of 5 elements (3 for the sticker and one for the panel and 1 for the brackets)