Howdy
here's my idea on burnishing edges.
I have sanding drums of different sizes and sand paper grits. I start with course and end with a pass of medium grit. I take a wool dauber and burn it down till it's small ball [smaller is better ] then knock off all the burn; I then use dark brown [ or any color you want ] color in till you get even coverage. Then another dauber [little bigger] I take Neat-Lac and cover. Let it dry [about 5 minutes] then take a course piece of canvas and rub it several times and it burnishes up nicely.
After an hour to dry, sometimes, I take the 'fine' sanding paper out and sand a second pass, sand lightly, then apply color and lacquer again.
This is also similar to fine cabinet lacquering technique ... multiple layers with time to dry in between give a nice build up of color and finish.
Like everything else...... practice on some scrap... I try to keep my daubers semi wet when doing the process
Good luck ......Happy Tooling
Tim