I've re-lumed hands (on a couple of WW2 military watches) rather than re-painted - and there's a very good video by Mark on exactly how to do it. Lumed hands of that sort are slightly different - with hollow metal outlines which are repainted/filled in from the underside - so not quite the same as your projects. But hands are easier to re-lume than the dial markers - and, if you do the hands without also doing the markers, it can look odd!