Brakes are back together just got to bleed the wheel cylinders and adjust the handbrake.
Painted the drums with Duplicolour 'Hi Temp' Cast Iron grey'. Not quite as dark as I thought it would be, but I reckon it does reasonably match the colour of freshly cracked Cast Iron soil pipe.
Hmmmmmmm, not quite the look I was after with the Sprintmasters. Maybe it'll grow on me?