No, it's a total loss. If you break a glass, or crack one, can you fix it? No, you can't. How ever way you put it, it will be noticeably broken or cracked. Plus, you pretty much cooked on and burnt the resin onto it.

Why would you clean someone elses pipe anyways? If a buddy of mine tried to that I'd ring him out. What if she wanted to clean it and save the resin for dry times? Now you're broken it in the process.

It's a write off. Apologize and buy her a new piece and don't expect to borrow anything from her in the future.