Share the work before perfection removes all personality from it.

Polishing can improve work and it can also sand off everything distinctive about it. Past a certain point you are removing the marks of a particular person having made it, which is often the reason anyone would care. Sharing earlier preserves the voice.

When you are on your fifth revision, ask whether the changes are making it better or making it safer. If the second, stop and share it. The version with rough edges and a clear personality usually connects more.