Anyhow, it became the subject of my one and only experiment with soda blasting and finally looks like this: I do not have the metal license plate, so I substituted that with a picture of my granddaughters. I also based the colour scheme on that from my eldest granddaughter's bicycle. I know the lettering should be polished aluminium, but I quite like it as it is and, if push comes to shove, I might paint the letters white. I shall see if the fancy grows on me.
Well, the mechanism has been degreased, cleaned and re-lubricated as appropriate (and very sparingly - I kept saying to myself 'if you can see the oil, you have used too much'. Luckily, I am short-sighted). The reels were removed, cleaned and the lovely bearings relubricated. The reel strips were replaced. Having read of the potential for harm from other threads, I absolutely left the payout slides alone (however, I think I did see a crack in one of the upper slides. It does not appear to affect the payouts, so this is a task for another time). Put the whole lot back together again and started to play.
In another thread, I mentioned that I had a couple of problems with the payout and with the skill stop. Not much I can do with the skill stop, I fear. the lever actuated by the button is too short to reach the reel 1 brake lever, so it will never be able to lift off the reel brake.
The payment problems are related to the triggering of 2d payouts. The original award card indicates that 2d will be paid when the third reel (rightmost) lands on 2, 3 or 4. It does not, however, mention that, if either of the other reels has a value of 5 or 6, the payout lever (see photo below) cannot be actuated. The respective lugs just do not allow the lever to be moved. Where the other two reels each hold a value of less than five, however, the 2d should be triggered. Sometimes this happens, but mostly it does not. The lever is moved, but by just a tiny bit too little to trigger the payout. It looks as though this is perhaps due to wear on the wheel and the lever, but I cannot find any means of adjusting the movement to adjust for this wear. If anyone could give some advice as to how such an adjustment can be made it would be gratefully received. Otherwise, I will keep it as it is until I can source some new parts. It is not perfect, but it will do!
Now, if the keys turn up for the locks, I will be a happy chappy and the machine can be wall mounted indoors. In the meantime, it is a good excuse to wander out to the workshop....