Thanks guys.
Didn't think there were any short cuts

but I do have a wife and three children and it is the summer holidays and they will have a lot of time on their hands
I do not intend on taking it down to bare metal. I don't want my truck to look better than it did the day it was made but I do want to restore it to a high class standard. I am lucking the fact that my brother in law is a first rate sprayer having work for Rolls Royce and some F1 teams.
The work will be done outside as we have no spare barns on the farm

but we will be moving soon where I can erect plenty of pole barns so long term it will be ok. Underneath the GMC it is covered in oil, I am in good mined to leave as such as this is great way to protect everything underneath.
With regards to the markings, I am thinking on that one, as me being me, I will go for something completely different than the norm, it would have to be something that I can educate people on and I am drawn to the enginnering/support side of thing and the US enginner corps where based in my neighbouring viilage.....
We are pretty spoilt for choice here in Dorset as we had some many troops based here before D-Day, we have the world famous tank museum down the road, we have RAF Tarrant Rushton which dropped and supplied most of the SOE into France and the gliders took of for D-Day and for operation Market Garden took of from here also.
The farmhouse here where I live was taken over by the British Commandos.
Any help Matt with the markings would be very much appreciated.
Cheers.
Jack.