What is the guidance we performing a weld metal build up of CS on CS with FCAW. The current thickness is around an inch, however, with the higher heat input of FWCA distortion might be a concern.
I've used FCAW in similar repairs in the past and did not experience undue distortion. I have no way of telling whether it will work for you. I have used FCAW to make welds where distortion had to be minimized and with proper technique and supervision of welders, I was always able to meet the goals.