[jimmontg]

Then like Ray said, you'll have to hand sand, but use a sharpened piece with the sandpaper to sand away from the center. No back and forth, move away from center and you will not cause new scratches when you move back towards it. Is it all brass?

As for JB Weld, you buy the original from an auto parts store and also the solvent they say to remove excess (acetone). Put the jbw on the side where it is to be glued and clean prior with solvent. Make sure the knife is clamped pointed up where the JBW cannot run out onto the blade or face of the guard. Put the glue where you want it and wipe all excess off where you do not want it. If you need to clamp the guard down you'll need some small bar clamps and put it in a vise. For a guard against the handle I use a piece of wood and clamp the point of the knife on hard side of clamp and the turning part against the hilt. I ground and glued one just for hidden tang knives.

Come back the next day, but check it after glue every so often and make sure no glue oozes out, if it does wipe it off with solvent, check handle too. It sets-up in like 30 mins but can still ooze for an hour or so, takes overnight to harden. It is grey in color, if there are gaps to fill they will be grey.