Vapor polishing 3d printed parts

[Design mentor]

There is one use of Acetone vapor polishing that I can recommend that is quite useful:
When a part is used in conjunction with rubber, maximum friction can be obtained with smooth rubber contacting a vapor polished part. This process was used in the production of a squeeze actuated slip-clutch ratchet-like screwdriver that I invented and licensed to Sears. The screwdriver handles were machined on a lathe then run through an acetone vapor chamber. This drastically increased the friction between the inside of the rubber grip and the acetate handle. The grip was slightly oversized and mounted on snap bushings over the handle - when the user squeezed the rubber grip it deformed and contacted the screwdriver handle. Even with the grip contacting only about half the normal contact area of a handle that a hand would have, the friction was so great that the overall torque of the screwdriver was about one and a quarter times normal.