stronger your paint will crack easier if you hit something. My front lower valence is urethane, no problems! My center panel is fiberglass since it won't hit anything.
: I can't really decide on styling for side skirts WW or Stillen. I've been told Stillen is urethane. I don't anticipate scrapping my side skirts (or should I) so does it matter if they are urethane? I am not lowered.