For luminescence, not flames, buy a tin of luminescent wax from any watchmaker's supply house (or a local watchmaker). Off-white is more easily visible than green.
For temporary fix, just wipe the wax on shaft.
For more durable fix, put the open tin in a pan and put pan on stove burner. Apply heat. Wax will burn off, leaving a powder.
Mix powder with epoxy glue to consistency of heavy grease. Paint shaft and let cure.
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I first used this principle to render a police officer's Highway Patrolman's sights visible in the dark -- for one shot. He would hold the revolver near an incandescent light for a few seconds. His sights would remain visible for his shift. Unfortunately, the flash of shot #1 blinds everybody around.