When I worked at UAL I took oil soaked stocks to work to submerge in MEK all day. All oil was gone. Finished super good after. Wiping and whiting goes so far. So does heat. You are still at the surface. To bring gun oil up 1/2" is insane. MEK did it. I do not think you can get any. Nasty stuff. Submerge in acetone might work. Does no good to wipe the surface.
I've bought MEK at Home Depot.
