Arson.

[NNescio]

PMI seems like it would be perfectly capable of creating it in aerosol form, which is explosive. Also, ethanol and methanol are both plant products, and are just as viable as plant based oils - plus, they can burn very quickly.

Alternatively, distilled pine resin. No chemistry required, and has a lower autoignition temperature (but a higher flash point, so vaporisation is harder). Alternatively, if trace byproducts are kosher, try apple gas or rocket fuel.