Hm, I'm thinking that following
these steps for applying stain [nofollow] to a guitar might work well with the alder wood of the crack.
I'm thinking of using the
Stewart-MacDonald colortone stain [nofollow] in orange. There are some funky colors available (blue, red, orange, green). The steps are sand wood, apply dye, sand, 2nd coat dye, then 4 coats of sanding sealer with 320 grit sanding between coats. I think I could do that.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fwww.stewmac.com%2Ffreeinfo%2Fa-blueguitar%2Fimages%2Fblueguitar2_07.jpg&hash=4e1fbb1d2d16a6caa7cc9c4a0d64119b5778c763)