The red oxide is actually not compatible with the cellulose/lacquer paint as it needs to be mixed with White/Mineral spirits so I realise I'll have to go steady and dust the first layer or two of the cellulose/lacquer paint so as not to blister it.
Both paints as they stand, i.e. unthinned, are of a similar viscosity.
The main reason why I was looking at the touch up gun is because the tripod will be sprayed stripped down so the majority of parts are no wider than about an inch and a half.
The mini type I'm looking at is one of THESE
The full size is one of THESE
, which I think is a spit for one of the HF guns.
The mini types are cheap and it will be only a one-off show.