Will this do?

[Kunal]

I'm unlocking my XP, and this is the only stuff I could find:
http://www.developerx.net/hq44.jpg

It's a silver based rear window demister repair paint.

[Diggrr]

That's the stuff. Just don't get it down in the pits between contacts you're connecting, here's the video link to unlocking.

http://www.tomshardware.com/column/01q4/011124/index.html