From a viewer, Tom Headrick:
To straighten warped wood, I soak in water. Or if you can't submerse them put a wet cloth on the inside of the warp curve, and soak until straight. Once straight, switch the water formula for an Elmer's white glue or the wood glue with water. I use the water to dissipate and conduct (permeate) the glue into the wood where the sap has weathered out, dissolved and left, leaving only the wood fibers behind. Capillary action also helps for cracks to soak shut and seal stronger. When the wood dries after final soaking and the change to the wood glue formula, it will not only stay straight, as when the original sap was contained when the piece was first cut straight has been replaced with wood glue, but the wood is now stronger than it ever was before because the wood glue is stronger than any original, organic sap is. Properly glued wood pieces will never break along a good wood glue boundary, again. (short of soaking out the glue.) At that point it will still take a stain as the glue is soaking into the wood, not staying on the surface. I keep several thicknesses (viscosities) of Elmer's glue and water at hand. And, once it is finalized then seal the grain against future water and the wood glue will stay in there and never warp again, stronger than the piece would be originally. I use it to restore not only warped wood but rotted wood, weak wood, broken wood, raw & weathered wood as a preservative. I just finished restoring several handles from yard tools, rakes, hoes, shovels, terribly damaged by weathering, by painting in the water and glue formula, let the wood soak it up, treatment after treatment, then seal with a poly. Works great.
I am currently doing rhubarb stalk for experiments, from the seed stalks. They are hollow like reed and large diameters, over an inch. From fragile, fiber cylinders to very firm. I have done very thin bushel baskets from flimsy to very firm. I also have brought back a wicker rocking chair from fragile deteriorating wicker to restored as the dried wood glue still has highly flexible properties. Even though it adds strength, it takes away the brittleness from the old wicker. Very cool processes and elmer's glue and water is really cheap, white glue. Since it all soaks in, there is no matter as to the color.
Um, great show! Thanks.