Re tip shape:
The tendency of molten wax to pull back from a point is a nuisance.
Many years ago the Giles Precision Waxer was recommended to me. Otto
Frei now calls it their Ottowaxer. (Unfortunately, I do not have
experience with comparable models.)
This unit has two kinds of tips, spatulas and pens. The pen has a
groove down its point which brings the wax into contact with your
work. I have modified mine, additionally, for a much finer point. I
fix a piece of 20 gauge silver wire to the pen tip. Sterling is soft
but it conducts heat well and can be soldered on to itself. I taper
the wire to a fine point and the curl a tiny loop at the end, as
tiny as I can manage. The wax does not pull back from the loop.
Re wax wires:
You can make molds to inject wax wires of various shapes and
diameters. The resultant wire will be flexible for a while. They
will be short. The difficulty is in finding an injection wax that is
not too gummy to finish easily.
Good luck, Jon Abbott