Hello Alan, just seen this by chance as I'm a 4mm type actually.   I'm afraid I can't help regarding the actual colour of the LMS Bauxite, I'm just as reliant on others getting it right and copying their work, be it historical descriptions, memories, paint charts or whatever. It's not much use knowing the LMS paint specification (quoted, for example, in 'The LMS Wagon' by Ken Morgan and Bob Essery), since it is a mixture spec defining quantities of materials - eg Bauxite Paint (Undercoat) com