Jules wrote:

I've been just completely stripping them right down (taking all the glass
out), then attacking the faces / edges with a sanding disc - but I've not
been able to do a lot with the decorative edges alongside the glass;
sometimes the years of paint is pretty thick there, and paint stripper
seems to do not very much. Will some kind of sand/grit blasting likely do
much for them without damaging the wood underneath?

I've used a heat gun and shaped scraper for our french windows, then
smoothed off with a sanding sponge.