Did you pay extra for the CC? In other words did they sit you down and say a SS is X-amount and a SS with CC is X-amaount? If not sometimes they mix the CC in the SS, it is cheaper than spraying an extra coat of CC. Are you tottaly sure there is CC in the "thick" parts? I agree take it back and find out what happened. I'm sure it was wet sanded, but maybe they didn't do a good job at it, there are many paint shops that dont have talented people when it comes to wetsanding.