Something you might try. I make my own scent killer for bow hunting. Are black lab killed a skunk and boy o boy. He was covered i sprayed him down with the scent killed. And the smell was gone. A few treatments and a few good washings and he was clean no smell what so ever. My point is thats extreme and it whooped that.
What I do is mix water hydrogen peroxide baking soda and a drop of soap. Same stuff you can buy at Wally World
. I don't think it will hurt your seat. As I spray it on my hunting camo all the time. And never seen any harm. If you try it just to be safe try it on some where hidden.
Best of luck