Your post struck a nerve! I have an '05 GX470 (Blizzard Pearl) that I have owned since 2007. I have never had any of these sort of issues however, within the past year I have noticed little chipping and flaking on the doors as it connects to the silver liner of the window. They are small but numerous. But what is crazy is that I happened to wash my car by hand which I haven't down in years and as I got a ladder and started to do the roof, I was blown away as at least a 1/4 of the roof was flaked off and had large flakes that were still half attached and blowing in the wind!
I figured the dealer wouldn't help much and the only thing I have done so far is I ordered a few paint pens of Blizzard Pearl online. I believe that this will help with the door chips but the roof flaking is way too large and not sure what to do there? Any ideas out there?