It really should heal over, a picture would help, if you have dead tissue
then I would cut it out clean and put Dr. Farwells seal over it...just to
keep the wound clean from other air born disease.

Don't clean out any tree wounds. The tree can do what it needs on its own.

That's true, but my helping hand can heal it faster and nicer too... with prove.

I hope it is a cambium scar and not an indication of a bad, or non-compatible graft. Al