There is a key to winning and that is CLEAN! haha
A lot of judges don't know particular mods or what has been modified a particular way. Most will judge on the most base aspects. Number one being cleanliness. If the car looks and FEELS like it just rolled off the assembly line, then you are well on your way. You have to be crazy about it. Nooks and crannies where no one looks and the usually dirty areas of the car like the wheels and wheel wells. If you can find dirt or buildup on your car then so can they. Condition of paint matters too...claybar is a godsend for prepping before polish and sealant/wax. A must do!
Before a major show(the ones you pay money to be in), I would take 3 days off of work and have a checklist of areas to clean. Which would include craziness like cleaning and waxing the underside of the car and even removing the tail lights to clean the body area behind them.
Chaos,
your car deserves to have more trophies, so go out and hit as many shows as you can and start stacking them up. You'll meet a lot of cool people in the process too.