The major benefits of what JVT is suggesting are;
1. Longevity, consider professional sanding and primer followed by paint(and clear coat I assume) Basically, the quality of your exterior paint with a fraction of the hazards.
2. Color matching, think how much better your car would look if you, say, painted the interior silver frost to match your ext. paint.
Especially considering the difficulty of matching silver frost with any store bought silver...I challenge someone to find one. I'm very interested in this as I'd like some color matched interior pieces. JVT, let us know if/when you do this.
