Replace metal bead on timber window

[Abyone]

I am getting some Cedar cladding installed around a timber framed window.The window has a metal strip or bead along the bottom edge. This will not be wide enough to bring any rain water out over the cladding.

Are these metal beads easy to remove - I tried but couldn't. The carpenter has put a boton directly under the bead making it even harder to access.
Even if I could remove it are different depth beads available ? I assume these pieces have a special profile that I couldn't just replace it with a new piece of metal.

Do I have any other options ?

 

[foxhole]

Could you indicate the metal you refer too can’t see any in photo?

 

[Abyone]

It's the piece spanning the width of the glass directly under the glass.
Each side of the window had a wooden bead but on the bottom that piece is metal not wood. It's slightly greyish brown in colour.
It's not a solid piece seems to be L Shaped to carry water out away from the frame.

Question is - does that piece come off, if so come off easily and if so would it be possible to replace with a different wider profile that would extend over my new cladding.

Or, what would be the best solution in my situation.
Should I leave that piece in place and allow rain water to drip behind my cladding.