To make beeswax workable for spreading on you bow melt it with pure gum turpentine, this makes a wax paste, the original wax polish used on furniture. Spread it on thinly, let it dry for a while then polish off, repeat as many times as you think necessary to build up a wax skin. I make mine in glass jars with airtight seals, grate the wax chuck it in the jar add a small quantity of turpentine, (don't use mineral turps it is claimed not to be as good as the pure gum type for this particular application), leave for a while then give the mixture a stir. If it is still too stiff or has not all dissolved into a nice workable paste add more turps, if too runny add more wax or leave the lid off to allow some of the turps to evaporate.
By the way I would first treat the bow with a number of coats of linseed oil first, using the application method used by old furniture makers. A coat an hour for a day followed by a coat a day for a week etc. just apply thinly with a lint free cloth then with another cloth remove the excess.
Do not use the paste on your string pure beeswax is best for this, other claim beeswax with a small amount of resin or is it rosin melted into it is good for strings.
Craig