Be a little careful stripping it down, the original paint may have been lead based.

Ideas about colour have changed over time, so you can take your pick.

As made pre-war by Drummond, likely to have been hide-the-dirt Black, even though Grey had been favoured by progressive makers for about fifty years. Black would give it a thoroughly retro look.

Unless someone completely stripped it in the past, Myford in 1947 were probably responsible for the Myford Dark Grey layer; if you want to recreate the original paint job that's it.

Greenish colours pushed grey out after WW2 because they create a better working atmosphere. Not Feng Shui magic but because the colour makes better use of the available light – green is brighter and less contrasty and boring than grey.

Machines made today often favour very light colours like cream; modern machine rooms tend to be kept very clean and tidy, and light colours make it easy to spot problems.

Dave

Had a sample of paint checked at local paint factory and it came out spitfire grey probably spare paint left over from the war.

David