Thanks to everyone for taking the time to reply.
To be a little more precise in my original question. We can take a full load of fuel to an airfield, around 21000kgs but only need to burn about 10000 to get there. This is due to the uber high cost of fuel there. This would leave us with full wings and plenty in the centre. If we left the wings full there would be guaranteed ice outside of the Boeing markings for cold soaked full and yes, the airfield does not provide de-ice and it could be a loooooooong wait in not particulary warm temperatures for it all to clear.
Could you turn off the centre pumps to allow the wing fuel to drop to a level even with fuel in the centre tank in this situation so as to avoid the CSFF.
The Boeing limitation refers to fuel
Loading and so I'm not sure if once you're airborne still technically counts as loading as it has been previously load
ed.
Sorry if I'm going over ground again but thanks.
PS
I heard of people putting on wing anti ice in the descent before but not this
As mentioned above, this will have absolutely no effect on the contents of the upper surface of the wing. It will however make the leading edge very hot!!