In message , Jimk
writes
Graeme Wrote in message:

Indeed. Perhaps make the cut 1/4 inch or so in from the rim, then go
around the edge with tinsnips, cutting from the edge to the rim, then
bashing the 'petals' downwards with a heavy hammer. All a bit long and
drawn out, but better than lacerated fingers.

I'd stick with the jigsaw.

Yes, I meant use the jigsaw to cut the lid, 1/4 inch in from the lid
first. Then cut petals from the saw cut to the rim, then bash the
petals downwards. Very wet here today, otherwise I'd be out there
having a go.

--
Graeme