Next effort:

Shitcanned the first rocket as the finish was dreadful
Started again and decided to go with plain silver as per the translite artwork.
I'm much happier with the shape of this model too.
Used a 6v Orange LED for the "engine" 'cos I reckon it looks like the shape of a booster exhaust.
LED actuation is by a second cherry microswitch paired together with the kicker atuating one and I silver brazed a "bridge" across the switch levers so now they work from a common P/F wire trigger.
After very minor adjusments away she went.