Removing Grip Tape
To remove grip tape inside a grip after grip removal.
Get a 3/8" Ø piece of coarse threaded steel rod about 16" long, put 6" long section of old grip on one end and bevel other end at about 30 - 45º angle.
Fill grip with solvent, drain solvent, put the rod in grip and squeeze the grip around the rod while withdrawing the rod held by the gripped end. Repeat if necessary.
The tape will get caught on the threaded rod and come out of the grip you are saving.
Clean the rod by dipping in solvent and wiping off with paper towel.