So with a bit of patience, some Alclad Dark Aluminium, and some Tamiya X-18, I've finished the chassis.
I orginally coated the chassis with Zero Gloss 1K, this makes a smoth surface that other paints do not stick to, so some areas did peel when I removed the masking, and so I've touched up by hand (i may have to remask and spray tho...
Following this, the only painting left is seatbelt buckles & the body shell... so assey will start soon