I am planning to build a small diorama featuring a Centurion Mk.III entering the waterproof testing pool at the Barnbow factory. The only reference images I have been able to find are b&w photos. Would the vehicles have been painted in the standard Deep Bronze Green by this stage? Obviously, no unit markings would be present, but I notice in certain photographs, a series of white letters/numbers around the hull and turret ... presumably these would have been factory markings.