Re: Can you really wash it TOO often?
Just like Patpur above - every Sunday afternoon, weather-permitting, the SRT gets the full treatment - wash (Meguiars Gold), wax, Rain-X, headlamp polish, clean the engine, etc. Twice a year it gets clay-barred & then the Meguiars Paint Cleaner, Polish & Carnauba wax, the 3-step system.
Then, daily, once again weather dependant, I'll remove the accumulated bugs & spray detail her.
If it's raining then nothing gets done until everything dries out again.
Since the '04 is the wife's car I leave it up to her as to when it gets washed & then finish it off for her with wax or detail spray or whatever is appropriate at the time.
The SRT only sees the inside of a touchless car wash in winter & then infrequently.