Here’s a series of photos showing the progress of a stem canker surgery I did today on a coast live oak in La Selva Beach, CA. The procedure involves canker removal with axe and power tools, cauterization, and poultice application. The prognosis is good.
Sudden Oak Life by Lee Klinger 
From a small lesion, to a very big wound. Was removal of all that living tissue necessary? Also the poultice; is that the white material paint it on? Does it consist of lime and ash? I would love to see some after pictures showing the wounds closed.
I’m an advocate and practitioner of wound surgery and cauterization and mineral drenching. I would like to learn more about your method.