i think the agressive chin spoiler needs to be matched in your case. it looks a little too big being black. might be the camera angle. i have seen them both ways, but here just feels like it needs paint.
Some shows may not be happy with you having beer. Also, the banner could be a problem too, depending on the size. Where are you going to put it? I have entered shows and judged them too.
Make sure your car is clean, that's the best advice I can give you.
Don't go all out and things designed to get attention -- hot babes, banners, etc. Let the car speak for itself.
Again, make certain it is clean inside and out, including the engine compartment and trunk. That can make all the difference in the world. And, sorry to tell you this, I would favor older cars over new ones. Anyone can go to a dealer and buy a car. Not everyone can restore and older car. That doesn't mean a new car can't and won't win, but I would favor the older ones.