Discovered this by accident on a silly whim, but this works really well.
Julian Millichamp suggests using a wet finger to smooth out the Shoe Goo on the bat's toe. That works well, but I still found the Goo to peel off easily.
So, I went with the following approach.
1. Put a bit of Goo on the toe (just like JM)
2. Use a knife / spatula / piece of cardboard etc to spread out the Goo as much as possible (just like JM)
3. THEN, apply a bit of Wood Glue on the toe, and use your finger to smooth out the Shoe Goo (instead of the "wet finger" approach)
4. Once the Shoe Goo is smooth, apply more Wood Glue, and spread out the glue over the toe (take care not to disturb the Shoe Goo)
5. Leave overnight
I found that steps 3 and 4 lead to a much smoother "finish", and also keeps the Shoe Goo in place much, much longer.
Try it out !