Thanks Wojtek.
I've done the initial painting of the 'padding', and the frames and bulkhead. Whilst the 'padding' is fine, I'm annoyed with the rest of it, as the paint is still tacky nearly four hours after painting. Once again, bl**dy Humbrol paint !
I used a brand new tin of 163 satin Dark Green, mixed with yellow to varying degrees for the two colours on the frames and fittings. The green is the one causing the problem, taking ages to even think about drying, and it's glossy, not satin !
Can't go any further now, until it eventually dries, and then it'll need a semi-matt clear coat to get rid of the high-gloss finish. But, as I'm now tired and hurting like Hell, I'm off to bed soon, and will check it in the morning.