What pen to sign pot call?

[turkeykiller22]

I was wondering what type of pen everyone is using to sign their calls with? I am looking to sign the glass soundboard on them.

Thanks,

[mastevt]

I use the Uni-ball Vision.  Its waterproof ink was a must since I use a water based finish.  Never tried it on plain glass tho.  I have used it on painted sound boards.

[SS Calls]

Pilot G2 gel pen

[mmclain]

Crows quill and an ink well

[lightsoutcalls]

Pilot G2 gel pen

Ditto

[king strut]

I use an Archival ink pen it will last forever, and you can buy different size tips.