+1 for Dremel diamond and oscillating blade.
The little diamond blade cuts like a scalpel, narrow kerf and small diameter allows relatively small radius cuts. Just FYI, all the Orthopedic fiberglass casts removed everyday are cut off with the oscillating blade to avoid cutting the patient, yet they devour fiberglass and resin like butter.
RV-3B flying w/7:1 0320 / carb / Pmags / Catto 3b / digital steam
RV-4 fastback w/ Superior roller 360/AFP/G3X/CPI/Catto3b