I got the same problem and asked a client of mine who just happens to own a plating factory. He looked at the trimmings of my car and this was his verdict:

"The trim is not chrome. It is anodized. The only way to get the white spots out is to strip and re-anodize the trims. That means removing all the trims from the car, and processes them in the anodize tanks. Job time: 3 days, cost: $1500. While this is being done, you can't drive the car as there is no trimming to hold the windows in place."

So ... right now I am driving my beauty around shining bright except for those white spots covering almost all the trimmings on my car.

Lode

PS, before I asked my client, I'd like to point out that I used every polishing product available on the market (literally) and none of them, not a single one removes the white spots. Glass wax made some spots disappear but hardly noticeable. Save your money buying over the counter chrome, aluminum, steel or metal cleaners, they don't work ... not for to remove white spots anyway.