zupfgeiger wrote:The luthier said that glue had filled the fissure and that therefore it was impossible to make it invisible.
Blonde spruce is a pain in the *** when it comes to cracks, however if he flooded the crack with CA, it never stood a cosmetic chance.
With cracks like that, sometimes, the best course of action is to see where you stand with cleats and *not* flood the crack with glue if its appearance diminishes once seated on the cleats.
If that's the case, you can usually refinish the whole top and make it go away as long as you properly treat the crack void with a non darkening filler agent (and I'm being an idiot by posting this stuff out loud for free).
Finish repair, touch up, things of that nature are usually going to be outside the skillset of any given "luthier" and that includes builders. Not that they couldn't do it, its just that most don't know how.