If you have a Base or Limited with the factory wheels then Meguiar's Wheel Brightener will do an amazing job on them, no matter how bad the brake dust build up is. The product is sold in 1 gallon containers in a concentrated form and retails for $19.99. You can dilute it 4:1 with water so you actually end up with 4 gallons of the stuff for that price. I realize most of us don't need that much, or don't think we need that much, so I'll recommend the 32oz sample size that autodetailingsolutions.com sells for a mere $8.49. Pick up a spray bottle for a couple bucks at the hardware store and you're in business. See
this page, about half way down.
Now here's the really important part: When using this on a wheel NEVER USE IT ON BARE ALUMINUM. Don't even think about it, don't consider diluting it further, just don't do it. I've used it several times on my Crossfire's wheels without issue ('05 Limited Roadster) - in fact, my wheels where almost black on the outside and were totally black on the inside after a weekend of track time at Buttonwillow back in October. I wanted to cry they looked so bad.
Here's the really important part, Part 2: For seriously deep cleaning your wheels remove them from the car, and work on them
one at a time. Spray the Wheel Brightener on one wheel and allow it to sit for no more than 15 seconds or so, then gently scrub with a wet, soft brush. There are plenty of wheel cleaning brushes on the market and most will do just fine here. Just get the brush wet and work ith into the recesses on the back of the wheel. The brake dust will just melt away. Rinse immediately with water. Move on to wheel #2, etc.
I've looked at the SRT6 wheels and presently I'm not sure about recommending this product on the SRT6 wheels as I can't tell if they're clear coated aluminum or not. Sometimes clear on aluminum gets compromised at the edges if there's a little curb rash, and
ANY acid based wheel cleaner can get under the clear at that point, and it's generally not pretty.
If you have aftermarket aluminum wheels, do not use Wheel Brightener. If you have chrome aftermarket wheels, it's perfectly safe. You would be amazed how many people have highly polished aluminum wheels and swear they are chrome, only to find out they aren't by applying a cleaner designed for chrome wheels. Aluminum is very soft, chrome is extremely hard. Be careful, and know your wheel material.
Then go buy some ceramic brake pads - Rotex Gold, Posi-Quiet, etc. - and just avoid the dust in the first place.