I discovered a homemade wood stain last week when needing to do a small project. Don't know how it would work on a larger one. Just take a fine grade steel wool pad, put it in 1-1/2 cups vinegar in a covered jar. Let set until the wool pad is dissolved (mine didn't completely). You can change the depth of the stain by diluting with water. Undiluted it looks like a deep walnut stain. You can also add regular food colouring to change the tone. I was extremely impressed with it. Of course, it needs a top coat of varnish to make it weatherproof.