Hi, the grey paint on loco 134 is actually anti corrosive primer/undercoat (ICI fastbuild) that was used when the new paint shop was opened, 1999- 2000, and when Irish Rail started to use 2 pack polyurethane paint. The loco would have had filler put on the body, then sanded down to an accepted level, then given two coats, possibly three of this 'fastbuild' primer. Loco's , and most of the other rail vehicles were never stripped down to the bare metal. There was generations of black and orange paint on the loco body and older coaches ( Craven , MK2's) so getting it back to the bare metal , while doable, would have taken too long in the eye's of the Irish rail traffic controllers, who were always screaming out for coaches and locomotives. The white stripe that you see, was one sided adhesive tape that was stuck on the loco sides ( and coach sides ) except the front which was handpainted with white undercoat then finished with white gloss as it wasn't possible to bend the white bands. I have only seen traces of the original paint on these 121 class loco's in the Inchicore paintshop and workshops. The grey that we see in the photo is too pristine for something that was painted in the early 1960's.
Paul.