A few years back I tried to remove all scent from my truck. I sprayed the whole truck, inside and out with Oxy Clean and then rinsed with baking soda water using a 2400 psi pressure washer (which had also been rendered scent free). I let the interior dry naturally. (For some reason I never have been able to get the CD player to work again?). I did put a pile of crushed pine needles and a hand full of rancid acorns in the seats while the seats were drying out just to give them that woodsy aroma.

Once the interior dried, I sprayed it down with Dead Down Wind. Took about a gallon.

I bought some 5X Scent-Lok shirts on sale at a local hunting store from which my un-perfumed wife constructed seat covers using her odorless sewing machine. Unfortunately just before I left for the camp, my blood trail tracking dog jumped into the passenger seat and farted ... so all that work and expense went for naught.

I haven't attempted this since.