It's amazing what one can do with a couple of toothbrushes, a bottle of 409, some water, and some time.

I've got one of the bundtcake wheels on my car completely clean, and will finish the other 3 tomorrow. At the moment, all 4 tires are off the car 'cause I'm also doing the brakes and wheel bearings, so if I"m going to do anything to the wheels and tires to prolong life and appearance, now's the time.
I've never done this, but I've heard of Armorall (or something like that) put on tire sidewalls. I've never seen what it looks like. Is it something that I should do to help the tire sidewalls live longer (lots of sun in CA!), or will it help with appearance, or will it make my 300D look tacky, or is it even worth the time and effort? Now that I'm pretty sure that I've gotten Lake Daimler stopped for good (i.e. finally gotten everything clean so that my rear footwells won't flood up every time the car gets wet), I can finally wash and wac the car and make it look like an M-B.
Thanks in advance!