Graphics problem- From smooth arcs to choppy arcs

When I modeled these wheel arcs and fenders they were smooth curves. Now as the model has progressed, the arcs have become choppy and ugly. The choppy arcs are also showing up in the renderings as well. Does someone have a remedy for this issue? I have highlighted the problem areas in BLUE.

Thank you for looking!

Cheers,

Randy

SolidworksSurfacing