Justice,
It still amazes me that Yamaha decided to hide all the aluminum under a dipped clearcoat finish and not go ahead and polish it out. I had a former member named Stilleto (Alan) from Marietta, GA see my swingarm and wheels one day when I was out riding and just ran into him. He wouldn't believe that they were polished aluminum and swore that they were chromed pieces and actually got down on his knees to check. Yamaha used some good quality aluminum in stuff like the triple tree, foot peg brackets, and risers they absolutely glow when polished.
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Jack,
The only thing I recommend using for protectant is when you wax your bike, go ahead and polish the aluminum with your favorite polish I prefer a paste called Semichrome, but have also had good luck with Mother's aluminum polish, and just wax the aluminum as you would the paint and chromed bits. The wax seals out contaminants and provide a level of protection that is not hard to remove when it's time to polish again. Clearcoat over polished aluminum works for about a year or so but then the aluminum starts to oxidize under the clear and it's a pain to get to clean. I'm wanting to try some of the Mother's polishing balls for maintenance polishing and see how they work, but alas no money so no research.
I've pointed to the pictures of my bike in the ad for reference and noted that it had been several months since I had last detailed the bike and that it had spent several months outside right before those pictures were taken. I took some of it today to show how well the polished bits had held up and with the exception of a few water spots it still looks good not quite show worthy but still good. Man I need to get this thing back together, it's been 2 1/2 years already.
CAD