hey im resoring a model 4 at the moment and my tank had the orginal paint still on it under the sticker and the bottom of the tank. i rang galmet and they gave me the formular for the avacado green as they no longer make it and took that to my local paint shop who stocked galmet and they mixed it up on the spot and i got to say it,s almost spot on considering the old paint it 55+ years old. Dulux tint SS27 in galmet gunmetal hammertone the paint store told me it was at my own expence if it didnt work. if you want to see how it came out check my restor
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=55858#Post55858