Quoted from xTheBlackKnightx:
They are both equally strong, if the automotive paint is properly clear coated. The primary difference with powder coating is extra rubbing resistance, and surface texture feel. If you are placing a game in your home, you will have more choice with paint, including reflective effects.
Completely false. Take a wedding ring and rub it on your car and see what happens. Do the same on a powder coated locked down bar and nothing happens. The wedding ring is an object a player will likely be wearing and it will year up your painted lockdown bar.