G'day MF,
I hope that includes paint. Let us know how it goes.
I won't go overboard on a 'full resto'. Probably just mask up the cowling decals, and shoot a coat of acrylic clear over the existing paint, if it cleans up OK.
The fuel in this one was very dark in colour, but didn't smell 'stale'. Anyway, I sucked it all out , and ran it through a filter, into my parts washing fluid drum!
Update: We have a runner! New, correctly gapped NGK BR2LM spark plug, and a fill of fresh BP 95 Premium; half a dozen pulls to prime the Pulsa-Jet carby, and away she went. Idles nicely, too.