Shaping the arching with a finger plane

I have been splitting time between work on a new Montagnana cello and a Guarneri violin.  The final work with the finger plane or scraper takes longer and longer.  This photo taken by Amit Zoran while I was demonstrating a finishing technique with the plane.  I like to run the plane along the grain so to have a clean cut on the wood.  Amit is an expert in the most diverse fabrication techniques, they go from the most ancient and forgotten to contemporary.