Can I assign a material to Tags?

Hi @jbernier might want to refer to this thread instead.

The best option I selected as solution. It basically makes use of the extension ‘selection toys’ which allows you to select geometry inside groups without exploding them.

https://extensions.sketchup.com/extension/c9266b2c-0b55-4d21-a0a4-72e23b8a0fb4/selection-toys

Also, you can tell whoever is exporting to assign a random material to your glass geometry so that once it is imported to Sketchup, you can just change the material properties instead of reassigning a new one.

It is what it is, but its better than nothing.