are google sketchup models that you download into your sketchup scene commercially able to be used?
It looks like you can use it however you want, royalty free. From the terms of service.
By submitting, posting or displaying Content through the 3D Warehouse, you grant Google and its end users a worldwide, royalty-free, non-exclusive, perpetual license to exercise the rights in the Content, as stated below:
- to reproduce the Content;
- to create and reproduce derivative works of the Content;
- to display publicly and distribute copies of the Content;
- to display publicly and distribute copies of derivative works of the content.