If I may, and this is a serious labor of love suggestion, I ran into this similar problem on the Gmax A109.
Create a 'grid' layer on the paint kit, and apply it in game so that you can get a good shot like the one above with the grid showing.
Once you have the shot, you will know where on the paint kit, to offset the lines that go across the door, to where it looks 'off' on the paint kit, but when it is applied in game, it looks correct.
It's a pain in the butt to do, but the results are worth it.
