I even had a minute or two to do some testing. Just as well I did as the platform was too close to the track and running boards of coaches and some buffer beams clouted it.
The big brown wall still needs some more work on the paint and the front edge needs some black emulsion and a bit of something to seal the open end of the bridge but it is close enough to ready.
I'll leave it all to set for a couple of days and then try to separate the 2 boards and see what damage that does and whether it joins back up again. Fingers crossed. Loco cleaning time and packing some rolling stock for the exhibition then.