That's fantastic news JJAstorll! I hope your career in Titanic Model Making prospers!
As for where it might have come from in the ship, I might be able to help.
In 1933, Olympic had her interior updated to be more modern and in a art-deco style which unfortunately meant they painted over the original wood (hence why the Olympic's Honour and Glory Crowning Time panel in Southampton is now a dirty white colour,
see link below).
Mark Chirnside's book ''
RMS Olympic: Titanic's Sister'' also describes the change to the ship's interiors (Page 245-246):
''
The old English carved oak panels in the public rooms and companionways have been painted oak green with dull gold edgings.''
The New York Times (1933)
''
Many ideas were considered before it was decided to build up on a background of soft Georgian Green, a harmony of colour in quiet tones relieved with the rich bronze balustrade, some touches of gold in the more prominent carved cornices.''
Ashby Tabb, Heaton Tabb & Co.
However, many didn't like the changes and the original designer ''
Edward Croft-Smith...was less than impressed by the new colour scheme and apparently vowed never to design another ship if ship owners were going to change them.''
These photos taken from Google (
see links below) show some pieces from one of the Grand Staircases painted green. If this is around the same colour then you might have a piece of the Grand Staircase!
Hope this helps and well done on restoring it to it's original splendour, that would cheer up Edward Croft-Smith!