Thanks for the ideas. I soaked the vest in kerosene out in the AZ sun for a day. Then I washed/rinsed in Dawn dish soap several times until the vest felt like the oil was gone. I now have an un-tin cloth vest that feels more like my Carhartt double front trousers. Far better for AZ hunts in 80 degree weather.
I will add that it is soft and pliable and I sprayed it with Scotchgard.
If I was to make a recommendation for de-oiling I would use white gas (Coleman) as the kerosene odor took a bit of work to remove.

Last edited by AZMike; 09/08/22 08:17 AM.