The answer to this problem is to apply some sort of chemical treatment to the punky wood. Penturners might use thing cyano-acrylic glue, but on larger projects this might get quite expensive.
My favorite treatment is acrylic floor polish. I use Future Premium Floor Finish. Typically I will rough turn small items like bottle stoppers and weedpots and leave it in a jar full of floor polish for a day or so. Once the wood has been dried it can usually be worked just like normal wood. On larger pieces with patches of spalting the floor polish can be brushed on to the spalted areas. Keep the rotted fibers wet until no more polish will soak in.
Other products are available that have been specially formulated for the task. The Rockler Woodworking Blog recently reported on a two-part epoxy product suitable for Strengthening Spalted Wood and offered some advice regarding staining and finishing after use.
Technorati Tags: woodturning, spalting
Categories: finishing, wood, spalting
|Rot fix Wood Restoration and Repair|
The name says it all: Rotfix is a low-viscosity epoxy wood restoration system for use on rotted, dried-out, or spongy wood.