zinc oxide

I have poor circulation evidently and had some lymph leaking from my leg.  That turned into a lesion that I was cleaning with hydrogen peroxide and treating with iodine.  It got slowly worse for a couple months.  I finally got to the wound care clinic and it's now almost healed after 3 weeks.  The only thing they did that I didn't was use gauze with zinc oxide in it.  Evidently keeping it dry was the key.  When I lived on the west side I used zinc oxide powder from the feed store to treat hoof rot and occasionally on my feet for athletes foot.  It never occurred to me to use it as a wound dressing.  I'm thinking I should order a small bag from Amazon to keep on hand.  It sure would be cheaper than professional treatment.