Anyone can get a new, fresh log book, I had to get one when I imported my VI. Likewise anyone can fit a sticker, or change the clocks. You get people doing full TME conversions with dials and seats. The one thing that you can't stick on, or easily swap, is the switch and wiring for the fog lights which is why it remains one of the better indicators of if it's a dealer-converted car.
You could always ask at your local dealer, they should be able to tell you for sure if it's a grey import or not.