Update:
I went ahead and spoke with Freddie - as suggested, he's very knowledgeable, very friendly.
I left my 335 in his care for an exterior detail (he offers "just a wax" for ~100 and a 3 step waxing for ~200 -- I took the 200 package).
I'm very pleased with the results. Freddie even gave me some tips about maintaining the look between washings and waxings. Nice guy.
Here are some pictures:
The only negative is that the stone chips and windshield pits kind of stand out now, since everything else is so picture-perfect. No swirls, no holograms, deep, rich color. I'ts a 2007, but looks like new!
Thanks for the reference.