I'm really just starting my journey with Godot, so be patient with me please 🙂
My question is - almost every model I import rather it has no material or not has this deep glossy shine to it, like the spec is cranked all the way up but I cannot find anywhere in the import dialogs to prevent this.

How can I turn down this spec/glossy effect?
Thanks.

Have you tried increasing roughness in the material properties after import?