Mick
The period to 1936 would have been G Crown R rather than GVR which was never used. The late fee notice is an actual pre War LNER transfer although I agree that the spacing may have been changed over the years. The lettering was script in Victorian times.
Larry
My information from Doncaster in about 1965 was that this method was used for the brown, red oxide and wagon grey. The red oxide was quite stable because the main ingredient was red oxide. This was the brown which would have been used on the re branded M&GN stock. In 1975, when David and I sorted out the restoration of the GN 6 wheel brake for the NRM at York, the foreman confirmed the batch mixing method although he only remembered it at the start of his career. He did not like 'amateurs' telling him how to paint a coach, but after we went through the full 13 applications in detail, he laughed and agreed to do it 'as they did'. Incidentally it cost more for the gold leaf than the coach cost originall in 1880!
Nick