I remove the old lume from the dial with a pin and toothpicks, you need to be very careful.
The hands I removed and gently scrapped of the old lume from the back with a razor, removed the rest with a tooth pick.
It is very easy to scratch your hands or dial, you always have to be conscious of what could mark them.
The old lume can be quite hard and it is time consuming to remove, Its tempting to hurry, don't.
My advice is don't attempt it on anything you are not prepaired to damage and happily put it down to experience.
When you have had a go it makes you look at The Zigmeister and Vac's work in a whole new light, I would love to know how they manage to make such a neat job.
I might post a pic later, not the PO dial though