Let it go natural. As long as the tree isn't rubbed all the way around the tree to the vascular cambium area the tree will be fine. Will cause a nasty scar but will not kill it. O and BTW save ya tar and spray paint it will not stop disease if it wants in your tree.
Thanks for all the suggestions & comments. I'll see what happens naturally.
Never be afraid to lead for the right cause.
"Whom shall I send, and who will go for Us?" Then I said, "Here am I. Send me!"