It is useful as a bond roller for applying a bond to the core material when attaching the flash door plywood. There is also a replacement roller, so replace it as soon as the sponge becomes hard. Since it does not contain as much bond as a hair roller, it needs to be applied many times, but it is easy to clean because it is a sponge. As for the special handle, if it is a plated mandrel, the plating will peel off and rust immediately if it is a vinyl acetate adhesive, so I would like you to make a stainless steel rod. When not in use for a while, the roller is put in a nylon bag up to the handle to remove air and store it. In this state, the handle will rust immediately. Paint has a rust-preventing effect, so I don't think it will rust easily. If the core rod of the handle is stainless steel, it will have 5 stars. Also, when using it with a bond, the nut may stick to the cylinder and roll and loosen together, so if you want to make a stainless steel rod, I think that a stainless steel nylon nut with anti-loosening resin is good. ..
(Translated by machine.)

I used it to apply a woodworking bond, but the sponge collapsed and the debris stuck to the coated surface, making it unusable.
(Translated by machine.)