My guess is that stations in the Highland and major scottish stations will get gaelic on signs, no others, especially in strathclyde, for that reason, Motherwell will possibly, however Hamilton I dont think will.
There is another 156 in getting repainted as we speak, however I have noticed that the vinals are on a blue background already, unlike the 170s. This looks very tatty!
I can see Dalreoch, Dumbarton Ctl and Dalmuir getting new signs and repaint soon, due to infrasture work, new car park (Dalreoch), resurface of platform (Dumbarton), new bridge (Dalmuir).
The your views, passenger charter etc also seem to have the half X displayed in the wrong area.
On a side note, has anyone seen First Insight for April yet, its not online or on train on tuesday.