All I've done is give this area a rub with some wax and grease on a rag and the firewall has come back with a shine. Firewall looks to be satin/semi gloss black (does appear to be slightly grey - GMH black?).

IMG_1583.jpg

Inside the plenum has been painted matt black from factory. Looks to have been done after the yellow went on - there is a bit of rustproof overspray near the RH washer jet and a fair bit of rustproof pooled in the low part at the centre of the plenum.

IMG_1585.jpg

I seem to have cleaned most of the lacquer off most areas under the bonnet and don't have a lot left under there anymore.

IMG_1589.jpg

Hope that helps.

Dave