Hello,
There's a chapter designated to finishing your hook rug but I am not sure on how detailed it is? I found it on Amazon.com and if you click on the picture of the book, you can go through the Chapters to see what the book entails. I would just give that a look and see if this book is something that would work for you :)
https://www.amazon.com/exec/obidos/ASIN/1881982947/bookfrompubus-20
~Kristi @ ELH