I just got a note from Roxane in the MCBA Visual Journal Collective alerting me to this video "Sharpen your Pitt Pen." (If the embedded video doesn't work, click on the video title for a link.)
In this video the speaker shows how to take a worn fiber tip from the Faber Castell Pitt Artist Brush Pen, pull it out, flip it around and use the other end, which is also pointed!!!
This must have been the maker's intent all along, and frankly, years ago when I used markers more often I had other pens that you were encouraged to do this with. But I've never heard anyone talk about this until now. (Perhaps it is something those in calligraphy circles experiment with all the time?) I have used a lot of these Faber Castell pens and simply discarded them when the tip goes.
It just so happens that I had a brush tip ready to toss and just performed this procedure on the pen in less than 5 seconds. It now has a new tip and since there is plenty of ink in the pen I'm in business again!
I bet you can do the same thing with their large brush pens. (I don't have one worn enough yet to take apart.)
Tell everyone. This will substantially increase the use and value you get out of these pens. The wearing down of the tip has always bothered me, now I'm much happier!