I have a Tupperware style plastic container that I use when stripping the finish from S&W grips. I fill it with enough acetone to cover the grips and let them soak, you may need to improvise a way to keep them submerged. I have never had to soak grips for more than 8 hrs. or so. Actetone is not as bad as some other posters make it sound, after all it is what your missus uses to remove her nail polish. I've never found the need to change while stripping grips, you can use the same acetone to strip several sets of grips before it becomes contaminated with old finish,dirt and gun oil. If there are still some remnants of finish remaining after an 8 hr. soak, I dampen a small square of brown Scotch Brite with acetone and the finish comes right off. Let your grips set for 24-48 hrs. to let all of the acetone evaporate before applying your finish of choice. Acetone will not hurt gun blue, just remove the oil film making it more succeptable to rusting.