The armor all wheel protectant is great stuff,it doubles the amount of time until wheels look aweful, but even with it, you will have breakdust build-up. I did the same as you. 09 328 used. I love it, but the breakdust is aweful. The most you can expect is like a week or two until they are aweful.
Give in, and get in the habbit of bi-monthly carwashes.
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Mine: 2009 328i Sedan | Titanium Silver | Black Dakota Leather | Aluminum Trim | Sports | Premium | Cold Weather | Paddle Shifters | 35% Tint | Colored Roundels | Polarized Lense | ... and Lots of Pride
Hers: 2001 X5 3.0 | Titanium Silver | Grey Dakota Leather | Premium | Activity Package| Climate Package | 200,000 miles + |... and lots of repairs!
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