Hi Mick,
Thanks but that site has comparatively minimal information and also some errors!
I'm working to a level of detail that identifies individual elements of a structure, even down to the separate parts of a single element - for example a high column is painted one colour at the base to about 4'6" high, then a 1.5" wide band, with a different colour up to the top. My 'data sheet' so far has an introductory page, 7 pages of closely-typed details of individual elements and colours for both specifications, and 3 appendices covering details of the actual paint colours, preservatives, and the symbology used on notices etc.
That's why I really need sight of copies of the original specifications.