Alcohol fuelled Coleman 295

I'd literally use Benzoline if its available. I'm not going to pamper it with highly refined naphthas or Coleman Fuel.
Or any kind of gasoline available from the pump if you're not particularly concerned over eventual gummings and carbonization in the vaporizer. Just ignore whatever additives there might be in it.
If you don't mind the toxicities, even any paint thinners containing benzene, toluene and xylenes would do just fine for the job.