You should totally try the chemical wash! If you don't like it, a light rub with some lime and or lemon juice will almost erase it, and I found that it doesn't sink in like a stain. It is scary easy to sand off. I had to touch up many parts when I was sanding... A few too many strokes with even 400 grit tears it right off. I also just used some black and/or brown fountain pen ink to wipe over some spots to even it out. Just do a good final sand and then brush some on and wipe it right off. Repeat until it looks right.
It will *not* do anything to glue. But I found that scratching up the glue with some 150 grit (along the grain) and then adding the ink(s) causes it to look just like the wood. And rubbing problem spots with some 0000 steel wool and putting on some of the wash *without* removing the dust/iron filings will cause some discoloration, but it concentrates in the scratches from the 150 grit. I used that to "age" the binding on the neck and body.
Worst comes to worst, black burst the edge over the repair!