Thanks Al. The decal was still wet from the Microsol when I took the photo and has since settled down perfectly with no silvering
The trouble with some parts is that they look absolutely fine until you cover them with paint - the resin fire extinguishers being the case in point here. The easiest option is to go with the Tasca offerings but these have poor strap detail and are also missing the nozzle. So I removed the bracket and clamp from the Tasca part, added a PE bracket/clamp and a nozzle from stretched styrene and the activation knob was finally added using a thin styrene disc....

I can't go any further at this stage as I need some more AK 794 paint - currently on order....
Gary