Todd Hello! The soft wax you saw most likely was disclosing wax.
It is primarily used on the dental side. Waxers use it for a
variety of things. Among those, joining parts. The only problem
I see, is with your need for no mess. For instance, I use it
commonly to add wax wires for prongs. After cutting a seat with
a cylinder bur, I then add a small amount of disclosing wax to
the seat. Then gently push the prong into place. With a wax pen,
and my added wire tiny tip, use the extra end of the wire to
fuse to the piece. Sometimes I flow a little just inside where
the prong meets, that will be burred away when cutting the seat.
It’s a simple technique, and many light projects that would
normally be fabricated are possible. Get some disclosing wax and
I’ll guarantee you’ll use it in your wax work. I also use it for
laying out stones for wax and metal. It’s not as messy as bees
wax. You might consider making your own wax for your purpose.
Use the disclosing wax, injection wax, inlay wax, and a little
purple or green carving wax. Use watchmakers metal tins over
your bench torch flame, keep adjusting the mix if it’s not right
by remelting and adding what you need; more inlay for instance.
You can create a more cream cheese like texture for spreading
using different proportions. I use a mix I have to fill sloppy
corners, graver gouges, pits. Hope that helps.