On Friday, February 1, 2019 at 5:29:38 PM UTC-8, John Foster wrote:
I was given a junked K8b due to water damage to the wood at the wing root and multiple tears in the original fabric and chipped/peeling paint. However, it looks like it may be restorable (worth it, that's another story). Anyway, I'm interested to know if there is an online repair manual that lays out the specific techniques of repairing or replacing wood in the wings, and specifications on what type of wood to be used, etc. I looked around and found the list of ADs, but nothing that laid out what I am looking for. I've contacted Schleicher as well, but they simply directed me to a link on their website, that didn't really give the information I needed. This is a certified glider, and I'd like to keep it that way, as I'm hoping to use it as a club glider.

John, there is a wealth of information, expertise and encouragement available from the Vintage Sailplane Association.

http://www.vintagesailplane.org/

I could expand on my comment if you wish, but my advice is to join the VSA, explore some of the past publications, and perhaps contact a couple of the names on the website directly. Just as one example, the subject of glues, and kaurit in particular, has been covered in articles in the Association magazine "Bungee Cord" within the past couple of years. Obviously, a magazine article is limited, but does lead to a knowledgeable author, perhaps in your neck of the woods.