Just ignore these sorts of people at car shows. Most of them are bitter losers anyway.

Do what I do, stand by your car and don't tell anyone it's yours and listen to what they say. considering my car is reasonably well presented I had some good ones at Ford Fair last year and a couple at Central Day this year.

My favourite was "Yeah, it's nice, but he's spent money in the wrong areas. Look, it's even running a shitty BC gearbox"