Hi Gavin,
I think the Red T2 with the 'ally' side pieces you've seen in the gallery is my build.
The pieces you mention were originally made (in two parts) from aluminium, but I couldn't find anyone who could weld them together, so they were re-made in steel and welded with a 'T.I.G.' welder. Once filed into shape, they had a light coat of body filler, sanded smooth, then primed and sprayed with 'Aluminium' paint, simple.
I had to make these in order to fit the lights from the 'Shoprider' scooter, as these mount through a thin metal plate on the scooter chassis.
If you are following Richard's build manual, then you could simply make the rear section (where the lights mount), and glue a thin strip of ally down the side. Alternatively, you could simply paint the panel on the car, nobody will notice.
Sorry for the delay, I've been a naughty boy and have been absent from the forum for a while (detention and 100 lines, I know).
Hope things are progressing well,
Regards,
Mark.