I have been doing #3 as well. On either letters/design stamped into the clay or on a sprig sort of thing attached to the outside of the mug. Depending on the color of the clay.....if it is lighter colored clay, I use Jill's Brown Patina and put it in the letters and then sponge off excess and wax over that. If it is dark clay, I use a lighter colored glaze and do the same thing.
Jill's Brown Patina
2 tblspoon Red Iron Oxide
1 Tblspoon yellow ochre
1 tablespoon rutile
1 teaspoon cobalt carb
4 1/3 Tablespoons Gerstely borate
Mix with water to the consistency of skim milk. Brush into the cracks and details of bisque fired clay. Wipe off excess with damp sponge. Fire to cone 5. May be used under transparent glaze.