What you're trying to do is get it to take the generated heat and use it to evaporate the diesel.
For that cat food tin, maybe a minute of torch on the outside of the tin would get the fuel pretty hot then using the torch to ignite the vapor would probably make it self-sustaining. Careful. Once you're above that threshold you'll have quite a fire on your hands.
That's the secret of the smudge pot. Once it gets above critical, the only thing holding it back is choking the air.
For that cat food tin, maybe a minute of torch on the outside of the tin would get the fuel pretty hot then using the torch to ignite the vapor would probably make it self-sustaining. Careful. Once you're above that threshold you'll have quite a fire on your hands.
That's the secret of the smudge pot. Once it gets above critical, the only thing holding it back is choking the air.