I think I need to keep a safe distance between me and a reel of wire for a bit now!
A quick summary of the types of coils or purls I did manage to produce that were presentable.
8.1 shows at the top of the photo, some purchased tubular cord and some of the metallic wire from gauge 20 up to 28. I made quite a few lengths of purl as in the centre then had fun recoiling these lengths over purl cores. "Beads" like those at the bottom were produced.
In the middle I pushed the length of wire inside cotton tubular knitting yarn then coiled. A length of this coil was then recoiled to produce the shorter fawn coloured purl under that.
The gold coil is the purchased gold cord at the top wired and coiled like the knitting yarn above it.
The bottom one is coiled wire which has been beaded with white seed beads before coiling.