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 
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.