Tenrocca, correct again mate.
That seam grinding process is not required for any of the Australia made bodies. It is, as you say, a process needed because of the sectional molds FFR used.
However, on most of the Australia bodies I have noticed a very slight "Flat" on top the front guards. Leastwise I've noticed it in RMC,s, Older G-force, BRD's and Harrisons. It is hard to pick but can be felt.
Best felt with a piece of cloth between the palm of your hand and the car when checking for it.
Because it is a very slight flat, it is often not noticed until after painting and then it is too late.
It tends to give the cars a flattish look to the front and makes the guards look wider than they are. ( normally a good thing but not in this case)
Have a really good feel for it and use a blunted hacksaw blade to get the curve when you bog it up.
You'll be cranky with yourself if you paint without fixing it cuz thats exactly where everybody looks when admiring a good paint job.
They might not notice it but you'll be conscious of it.
Hows your glasswork going now?, you happy with the rolled edges you did?.