Thanks guys for all the feed back, any of you tried CG wheel guard? I tried it on my previous wheels and didn't notice a big difference...
I'm not familiar with that particular product, but I tried their Smart Wax Rim Wax years ago. It was a nice product - but there is stuff out the that is much better an easier to use IMHO.
I'm going to call this "Everything I Know About Dirty Wheels"...... This is all based on my experience and some opinions as well.
To me, wheel coatings / wheel waxes are a TON of effort that isn't necessary any longer. You could spend a day pulling your wheels, getting them surgically clean, waxing/coating them - only having to do it again in a year (or less).
The reason I feel this is a waste of time is because today we have AWESOME spray coatings like CarPro Hydro2 that are easily renewable, repel dirt and brake dust well, bead excellently, and significantly reduce the time & effort it takes to clean and coat wheels. I would highly recommend this product.
All you have to do to use it is clean the wheels with whatever, rinse well, spray them with a fine mist of Hydro2 and rinse off. That's it....
You have 3 months + of awesome protection for an extra 5 mins of work - and you are getting all the nooks and crannies of intricate wheels that are difficult (impossible?) to get with waxes and coatings. It also adds a nice glow to the wheels.
After this, you will only need car wash soap to clean your wheels, especially if you are doing it once a week or more. Every once in a while - just top them off with Hydro2.
Almost all of the brake dust will rinse off with Hydro2 coated wheels. I recommend using a pressure washer - it really works significantly better than a garden hose to blast brake dust off of dirty wheels.
There is no "magic" and very safe wheel cleaner. The more aggressive a wheel cleaner gets - the more likely it is to damage delicate wheels, or if the directions aren't followed perfectly.
One common way manufacturers' make their wheels cleaners "more aggressive" or "work better" is to use cleaners as ingredients that are very high pH (basic) or low pH (acidic). While this does make them work better - it has been shown to damage some sensitive wheels and brake parts on some vehicles.
Another way manufacturers' make wheel cleaners more aggressive is to use oxalate based ingredients that "chelate" or bind to iron (think IronX). So, these type products tend to work well on vehicles that use semi-metallic type pads or aggressive pads on iron rotors. The metal particles coat and embed in the wheel and it looks filthy. These cleaners actually bind to the embedded / surface iron and make it easier to remove.
But, while the cleaners are relatively safe, there has been instances of them discoloring some bare aluminum wheel and brake parts.
P21S and Griots Garage (green formula) make some very safe pH neutral wheel cleaners that will not damage any wheel. However, IME, they are only slightly better than concentrated car wash soap.
Take an oz or two of your favorite car wash soap, dilute with DI water to 32oz in a spray bottle - and add a foaming sprayer....and...BAM! You just made a pH neutral wheel cleaner that is safe on 100% of the wheels out there; and it cost like 40¢.
Since you have a Lexus, I'm guessing it is a performance model that has semi-metallic brakes... These are the brakes that usually make the worse mess. As I mentioned before, simply switching to low dust ceramic pads would solve your problem in an instant. You would go from having the dirtiest wheels to clean, to wheels that only get as dirty as the paint with this one modification.
Semi-metallic pads tend to have more initial "bite", but ceramic pads are more rotor friendly and stop just as well. I made the switch on my BMW M years ago and never looked back...