drl wrote:I can see that putting a bit of "grit" on/in the glue will keep the pieces from moving around but what about working the pieces after the glue dries? Seems the grit will have an adverse affect on saw blades, router bits, jointer and planer knives, drill bits and the list can go on. What's the general opinion out there?
To me this is an unnecessary worry. If you use the very very small quanity that Nick recommends the chance of you hitting one of the grains is probably astromonical. Then add to that the chance of causing damage if you do hit a grain of sand and the odds soar out of sight. Then add to that the number of saw teeth and again the number becomes something like your chance of winning the lottery if you never buy a ticket.
One time had to rip a bowling alley (to make a work bench top) which is held together with cut nails. I used my circular saw, after donning what amounted to a flak suit with full body and head protection. I don't know the exact number of nails I cut through that day but I do know I never got hit with any of the scrapnel nor did I ruin the blade. In fact that blade has been to the sharpener once or twice and is presently mounted on the saw.
So I think the fear of a hitting a grain of sand or two is without consequence.