The liquid isn't as much of a concern. You can extinguish a cigarette in gasoline far more often than not.
It's the stoichiometry ratio of the substance you have to be concerned with (air to fuel ratio).
Kerosene's low evaporation rate makes explosive combustion less likely than a substance of a high evaporation rate. (each substance also has a different ideal ratio/ stoich value, boiling temp, etc... gasoline is 13-15:1 for automobiles ( 14.1-14.7:1 depending on who you ask)
I'd personally feel safer with kerosene, but that's also a mixed bag if tricks. It would remain flamable longer, and burn longer though be less prone to accidental ignition. It would also burn cooler if I'm not mistaken; but that is near irrelevant to foam and paper stock. A spill on wood and acetone/alcohol will be gone soon but kerosene is going to embed itself a bit creatin a more flamable wood....point is there is a large balance of variable conditions to be hashed out.... just be careful... the orange halves I'm about to squeeze into shaved ice can burn like candle pretty easily too 😄
