I would like to buy or fabricate a tool which would allow me to sand the inside of hollow-form vases, particularly the inside walls. My purpose would be to eliminate the "shaggy" condition of the inside walls, which sometimes happens when hollowing green wood pieces.
My imagination visualizes something mounted to a drill extension, the head of which is small enough to fit through the openings of a vase (with strip-sandpaper flaps wrapped around the head). The vase openings typically would be in the 1 to 2 inch diameter range. Once inside and spinning, 2 to 3 inch strip-sandpaper flaps would extend out due to centrifugal force, and would rub against the inside walls of the vase as the drill spins. The design needs to provide for regular replacement of the flaps, with some means to secure them when replaced.
I have seen "flap sanders" offered on the market, but these tend to be densely-packed circles which don't have the capacity to expand out. Most of them are too big for a vase with a small opening. They seem to be meant for working on outside surfaces of a curved or irregular form, not for inside a vase.
Any ideas for purchasing or fabricating such a thing would be appreciated. Thanks!
Robert Marshall