Boston, after our earlier msgs last night, I went to my Friends List and matched trophies with you. As mentioned above, you only have to earn the trophies on the list. You had 11-12 trophies still to get. Most are really easy and I sent you another msg last night describing exactly where the blue tires are at Bathurst to get the Hidden Gem trophy. Don't make the final left turn to the finish line and go straight off track behind the wall and ram the blue tires hidden behind the wall.
Two trophies for buying and winning cars are easy, but remember the 25 "15th Anniv." cars don't count in that total. I needed 125 cars, not 100 to get the trophy. Also easy are 2 for buying helmets and suits.
The last trophy for me was the Autobarmy 7903 mile trophy, but it takes about 7950 miles to actually open it. About 3 more wins in races on "Like the Wind's" Route X 18.82 mile one lap race will get you there. At over $140,000 per lap to boot.
I still have some coffee-crap stuff to gold and one of the drift events I haven't even tried; along with some of the conehead bashing. So, looks like it's really easy to get the Platinum in GT6 for most of us and probably a good thing in the long run.
All they have to do now, in a later update, is to debut the new "Double Secret Probation Platinum-Chromium" trophy for getting all golds everywhere. Then, everybody would be happy.