Thinking of aerating and topdressing my lawn in the coming week here in upstate SC. It is bermuda w bare spots in the front- mix of shade and little care for the past couple of years left it looking rough. Is it too late to do this and possibly throw some seed down when top dressing? Suggestions on top dressing? I was thinking riversand and compost- blend 50/50? It is a pretty heavy clay yard as it stands.