I got a question concerning 'old version' weapons as talked about the in the Full List of Updates thread since High Seas: viewtopic.php?f=70&p=66463#p66463
"You can have physical and fire, cold, energy and poison damages on your weapon.
Use an elemental hammer to target an 'old-version' weapon to fix it. Until it is fixed, it will spread the single elemental damage on the weapon with physical."
I'm a returning player and completely unfamlier with High Seas so I have some questions.
Here is my weapon, which I assume is an old version since I haven't been around for a long time.

And this is the only Elemental Hammer that I have left:
Now you can't see it because I hovered over it to show the text but, it's a white hammer.

You can see why I have questions, it's only 1 charge... I don't want to f*ck up

So, can I just use this hammer on it and the weapon will be fine aka 'new'?
Will I have to get a frost gem as well?
Anything else I should know?
Thanks,
Haldir