Nice work, she'll look good with your double Fairlie.
Regarding the colour, taken from Festipedia, in turn quoting an early FRS magazine:-
"Finally, may I add, there is absolutely no truth in the rumour that Palmerston is to be painted Pink and re-named Harold Wilson."
By FRM-029-005 (Summer 1965), it was noted: "Some humourist(s) decided to contradict Mr Wayne in Magazine 27 and Palmerston duly appeared in pink paint with Harold Wilson on the nameplates for A.G.M day.
This link http://www.festipedia.org.uk/wiki/File:670810_Boston_Lodge_Palmerston_GE.jpg shows it a little later but still in pink!