I don't have access to an Alt2 PoH, or (for that matter) an Alt2, so I can't confirm this. Hence 'I believe'. Since nothing I'm rated for or have access to currently uses anything other than AVGAS, my interest in the matter is purely curiosity, and I have no reason to offer definate proof. I simply provide information I'm aware of as a possible lead to anyone who may have more interest than I do.
So:
I believe (there's that phrase again) that it is legal, under some jurisdictions, based on the PoH, to run an Alt2 on heating kerosene, provided you filter out the excess water. As far as I'm aware (with no particular proof), this is not legal on the G register, but can be done on some other European regs. I only know of this being done for private ops, not for commercial ones.