Looking very nice there N!
In fact looking superb for Fs9!!
Nose art I would think would be painted using standard ac paint, which with all-metal ac may have had a lacquer finish to seal it in and protect it, and would therfore have had a sheen or shine to it. Invasion stripes were only meant to be temporary, and some/all of the paint used for this was water based, so would give a matte finish. I've also read that because the stripes would wear/wash off too easily, some allied ac had the stripes painted permenantly on...so you could have gloss invasion stripes as well???!!
Cheers
Shessi