Have any of you guys ever tried a product called KROIL? If you haven't give it a try. You can find it at most well stocked auto parts places and gun shops. I use an old hand held oiling can bottom, and put just enough Kroil in it to cover the bolster, with the knife standing straight up on it's end in the can. Let it soak in that Kroil over night or for 24 hrs. depending on how bad the knife is. The Kroil will look like tomato soup from all the gunk it eats out after it's set for a day and did it's job. I've had knives that I couldn't open the blades with pliers (without breaking something) and gave them a soaking, next day I could open the blades with my little fat thumb. To avoid damage don't let you handles set in it, it is a very strong cleaner/remover. Only fill your container up to the point where only your bolsters are submerged in the Kroil. Getting a drop or two on the handles wont hurt them if you wipe it off and don't let it set on the handles any length of time. Also, don't try to use it in something plastic like an old prescription bottle for blood pressure meds. I will desolve the bottle. Don't ask me how I know that.

I've tried just about every cleaner/remover on the market and some home made mixes but Kroil beats all I've ever tried before. I began using it to remove fouling from rifle and pistol barrel. Plug the muzzle end with a rubber stopper and fill the barrel up to the top. Wait for 24 hrs. and then strain it through a paint filter when you dump it in your dirty collection can. From there you clean the barrel as you normally would. Do this test with it, clean a rifle or pistol barrel as good as you think it can be cleaned. Then plug it and pour Kroil in the barre,l as I said. Wait 24 hrs. and dump the Kroil, rinse the barrel with WD40 or any other spray and then clean the barrel again. You will see from the rinse andsecond cleaning what was left in the barrel after your first cleaning. The other good thing about it is you can reuse your dirty Kroil over and over again from your dirty collection can. It doesn't lose it's strength or evaporate. I have been using the can I have now for the last 6 years, and I clean more firearms and knives with it than I could ever count. I don't think I would let Kroil and celluloid get too close together. I've never used it on a cell. handled knife but I don't think any good would come from them meeting. Let me know if you like it after you try it.
Aimus