rockm

Joanie, you coudl try that approach, but it complicates the process greatly. Bark is basically dead tissue. It can vary in thickness and flexibility. The tissue underneath it, the cambium is the actively growing part of the tree. It is what is grafted.

You could try to plug a hole with a chunk of bark with cambium underneath. In order for a graft to be successful, though, you have to match the cambium of the graft to the cambium on the trunk/limb. The bark complicates that match, which can be tricky with out bark, even further.

Patience is better than grafting in replacing bark. Even big trunk chops can look acceptable in a few years...