Tech Orders, Tech Orders, Tech Orders!! Thank you sir!
Unfortunately, the -23 does not specify any particular method of removing the rain erosion tape. Best advice is slow and easy, and don't use chemicals or metal. There are separate instructions for removing adhesive residue, however.
Jeff and I were expediters at Spang back in the day. Me for Specs, him for APG. One of the best guys you will ever work with, if you are lucky enough.
LM Aero Field Service Engineer
Woensdrecht Logistics Center, The Netherlands