I bought another alder body that Im going to try several different things on. Seems to me that since these look so much like real old ones that are beat up that they manipulate the tannin level in the wood somehow so Im going to try that first. Here is what Im going to try...
Lye solution rub
more concentrated lye solution rub
fuming with ammonia
household ammonia rub
concentrated tea rub
Ill post a picture after I do these. See what it looks like. Ill make sure to tape off all but a stripe when fuming so I dont darken the whole body.
If these methods dont work (and they probably wont) Ill try different stains, dyes, etc.