I saw the Bajas at Pep Boys and yes, they are polished alum.
I was trying to be thrifty when I bought my wheel package. It was either nice wheels and no name tires or BFG MT's and low end wheels. I went for the BFG's obviously and for good reason. They are a great tire and have the same 3 ply carcass w/2 full steel belts and mileage as the KO's. I'll bet I get the same mileage as you because I have thicker treads than the KO. I have twice the tread thickness as your KO tire. I am working on you real good aren't I? I looked at General MT's, they have a 2 ply and low mileage(20,000). I should get 40,000 miles out of my BFG's no prob.
Back to the wheels, the ones I have now are only 40 bucks, Pep Boys is selling the Baja's for $94. I think I might splurg and buy the rims later and just ditch or sell my black ones. I also need a spare, I might order that one from Natl Tire. You don't know until you try these things and you're right, we have expensive hobbies. I have always had expensive hobbies so I am used to it. Before this I used to be big into 1/4 scale R/C planes....talk about cash magnet.