[Ron Wood]

There is another trick I forgot for oil soaked grips. I live in the desert Southwest, so i have let the grips lie outside in the hot sun...that caused the oil to percolate to the surface and could be cleaned off with any number of solvents...heat, clean, repeat. I did that with a set of grips that had been on a gun stored in a barrel of motor oil. Didn't make them look new, but it got rid of a lot of soaked in oil. Same thing could be done with a heat lamp. Might be worth a try.