While you are editing or painting the skin weights, you can reset the weights the their initial, default values at any time.
To reset skin point weights
- Select the skin object (or specific components on the object) whose skin point weights you want to reset.
- Select
Skin > Reset Default Weights.
Note: When skin layers are present, resetting default skin weights removes the existing skin layers, resets the skinCluster weights, and then reinitializes skin layers.