This Waterman Man 100 Opera took a nosedive from a substantial height, and the nib was accordioned as a result:

I restored the shape; here’s the result after the metalworking phase was complete. You can see that the white metal plating (platinum or rhodium, most likely) has been lost during the re-shaping process:

The final step is the restoration of that plating; in this case, I used platinum, as did Sheaffer when it first introduced this two-tone design in mid-1931:

Restorations like this are quite time-consuming, especially when performed by someone with perfectionistic tendencies, but the results are very rewarding.