I do a lot of box joints, they are strong and I like the look.
I always cut them just a little longer then needed and then clean them up to get them flat and even with the box. The problem is how to do it.
I have tried a chisel, that really doesn't work that well for me, even with a really sharp chisel.
I have used a flush trim router bit and that generally comes out with a blow out on one of the pins.
I have used a block of wood with sandpaper on it and that does work but it take a lot of work with the end grain.
So now I am using my little PC (371) belt sander and that works well but I really have to watch it so I don't mark the surface of the box.
So what have you found to be the best way?