hey Dave for crack repair I do this, my LHS has these inexpensive little tips for thin CA that feed a small amount of glue into small areas so you don't soak all that 7$$ a bottle glue into the surrounding wood space.
then you don't have a slab of granite to sand, the tips work well and you don't have to cap your glue bottle every time you use it I even will go a couple of days then when it clogs I snip off a 2mm bit off the end and I am going again .