How can you mix a honey poultice to heal a wound?

Sure you should? While there is a little evidence that honey can be helpful to wound healing, in my experience we have many, many products (alginates made from seaweed, for example) more useful than honey. Any wound that has been open long enough to need honey needs evaluation by a doctor with expertise in wound healing. Ask him or her if honey would be appropriate for the wound in question. .