So I bought this GA110C-7A from Ebay cheap because its battery was flat.
I'm still not sure I like white watches so immediately swapped the bezel and strap. Already an improvement in my opinion but I decided it needs some Lume paint on the face to make it look really good.
I bought some Lume paint from watchlume.com. It's not the easiest stuff to work with; you have to mix the powder with some white goo and it is still quite gritty when mixed so it can be hard to get a smooth finish. I also found that it didn't stick very well to the plastic. On the indices I managed to improve adhesion by scratching the surface, but by the time I got to the hands I decided to use the white goo as a primer and it worked alot better.
The hand pullers worked well for the minute hand and subdial but the cog type surround on the hour hand made it impractical so had to use a lever (the other end of my spring bar tool). This left a mark on the face which was concerning until I tried using some cleaning fluid I found under my sink; I think it's acetone but not really sure, it says it's N-Butyl Acetate. As a precaution I set the watch into hand setting mode and moved them to midnight then removed the battery before pulling them. Putting them back on at midnight was easy and I'm pretty sure they're lined up properly. Replacing the subdial hand was very tricky because the hand is so tiny and lining up the hole is almost pure luck.
I'm pretty happy with the result though my perfectionism means I will probably always be a little unhappy with the finish on the paint. My next project is already lined up but I think this time I will grind the powder in a pestle and mortar before mixing. Also a note for anyone planning to take a watch apart in the future; be really careful with the little dial cushion pads as if you lose them you will never find them.
I have bravely put this watch in the sink for half an hour and not a drop got in.