What kind of ink will permanently mark a golf ball?

QUESTION:
A Sharpie marker is nice for marking a golf ball, but it washes/wears off quickly. Is there any kind of ink I can get that will be more permanent (like the ink used for printed logos on golf balls)?

ANSWER:

Answer by pete
Permanent Ink. buy a pen which says it is waterproof and fade proof and then complain when itdoes fade, as eventually all pens will.
(like this one maybe: http://www.essentialscompany.co.uk/Markers.html)
Or you could use paint markers.
Or you could use paint. (Spray cans)
Or you could engrave them.
On your could buy some really really original ones, like pink and blues stripes, then everyone will know which are yours.