Again, I can’t really see what’s going on with just an image. That cross, hatching looks like the face might actually be hidden.
The one thing I (and every other serious user) would recommend is…do not…under any circumstances…work directly with the geometry from an imported dxf. Trace over it using SketchUp’s own drawing tools and make it much simpler. For instance, those swoops on the top of the shield could very easily be done with the arc tool…using only 6 or at the most 12 segments…not the 3 million they appear to have at the moment. You could probably do the entire shield outline in a few dozen segments.
Working with geometry that dense is a recipe for difficulties and frustrations.