After creating your 3D part in SketchUp. Export your SketchUp file as an .stl. You will need the .stl plug/extension installed for this in sketchup.
Use push/pull tool for through holes. Hollow area may be a problem, but if wall/surfaces are closed, I think you will be good.
When you bring your .stl file into your 3D printer program you'll be able to pick the % of fill.
Last edited by zfasts03; 09/22/19 07:32 PM.