With the paint needing at least 6 days curing time I decided to get on with other stuff.
First the clocks. I tried masking and painting but I couldn’t achieve a satisfactory standard and what I did just emphasised the dirty glass.
I decided to split the clocks making it easier to repaint and clean. A jig to hold the clocks is essential
I used a small screw driver to lever up the bottom edge of the bezel clamping ring. To minimise the damage to the ring do this in stages. Trying to do it in one stage WILL tear the metal. I went round 3 times until it was open enough to slip off. Care must be taken not to damage the rubber seal.
Carefully separate all the components and remove the glass seal the reeat the procedure with the other clock.