Thanks to everyone for their encouragement and advice.
Bit of an update: I have not made much progress on my figure backlog because I had to finish some vehicles (which turned out really well) and clear the decks. Also some of the half painted figures I took a good look at and decided that my painting standard had improved since I started them (a couple of years ago) and I would be better off consigning them to the dip and starting again.
So 23 figures have been dipped and cleaned off, re-primed and re-undercoated, and I have started painting them again. That is next week's project. I will bash on with them start to finish and not be distracted by anything else.