I've been learning a lot about topology for hard body modeling, there's a reason why I ended up being a rigger and not a modeler, heh. Anyways, I'm getting better I think, especially after saving some reference images of other artists cars and studying their wireframes.
First up, this is my toy model in the box:
Saturday's effort:
Sunday:
Monday:
Starting to flesh out the guts a bit now and tidying up some edge loops as I go.