Yes, but you can’t buy napalm and agent orange at the ranch store...
The nice thing about the Detroit flamethrower is that it uses E85 gas, available almost everywhere. Finally, a practical use for E85.
The only downside I see is that the fuel can soak in, but it won't adhere. Someone will have to invent a thickening agent, like is used in napalm, to help it stick. It could be sold in stores right next to the other automotive gas additives.