Did the show thing with my last car not concours but on club stands and it stops you enjoying the car in the end to worried about stone chips and scratches just before a show gonna just enjoy this car but still try my upmost to keep her mint.
Although I Autocross an average of 6 times per year along with at least one HPDE (my BMW CCA Chapter allows Z4's), I still work on entering the contests, especially my Chapter contest. Car judging in that contest is brutal but fair.