Originally Posted by
Simon Barden
I'd use very thin CA and first fill up the crack and once that's filled and level, then rub it all over the board. You could get some black CA for the crack, but I've found that it's rather translucent, so not that much better than clear.
I've got a neck with the original (terrible) engineered Blackwood and had to do that, just to fill the cracks and help keep it all together. I then scraped the board back level with a sharp box-cutter knife blade and it's now a lot smoother and more robust. You need the thin CA (or extra thin if you can get it - I used Glue Boost stuff which doesn't fume) so taht it wicks into the board. Normal medium CA will tend to just sit on top.