Thanks; I did not put a return edge on, but I have seen some recently that others have and they look great! They would be best done before you shim though, you dont want to press too hard on them after they are done, the weld can start breaking.
Some other great techniques that look easier than the ABS paste, like JB plastic weld used instead. Also some have burned and fused together the weld, then filled in with the plastic weld and painted.