I've used the acetone soak method a couple times, but I set it outside in the summer so it would get warm. I used a disposable turkey roasting pan, held the stock "under water" with a brick, and covered with aluminum foil. One time it worked well, the second time not so good, and I had to replenish due to evaporation a couple times before I gave up, a week maybe? I then bought a sack of Fuller's Earth, packed that on it and got usable results.
Note too: Fuller's Earth works great to suck the excess oil out of leather too. I bought a vintage Brauer Bros. holster that the seller kindly soaked the bejesus out of with Neatsfoot oil, so badly that you could literally wring the oil out of it. A week buried under the Fuller's Earth saw it come out ok - at least it doesn't leave a brown oily patch on my pants leg now.
Oven cleaner: doesn't that stuff attack the cellulose in wood?
