At last I have completed the final tutorial and it is attached below. It covers the use of the wire/metallic patterns created in Parts 1 and 2 and their transformation in GIMP and GMIC.
As usual it is geared at GIMP neophytes (love that word) and essentially it should foster further exploration of GIMP and GMIC - a longer journey
One example of the tut outcomes is shown below but do not let that put you off -
I have tried to proof read the document but if anybody has problems or finds errors, then please let me know and I will fix it.
Inside the ZIP file are a couple of patterns and a font that I use in the tut and they will need to be loaded into GIMP.
EDIT - My sincere apologies Pat has advised that OMG_wire_tile_hexagon_gold wire pattern was not included
It is now included with a couple of others in zip file below