Quote Originally Posted by [XC] Aerosupra View Post
...I am going for some rough sheets, say 100 grit or similar like Dinos said, otherwise it's torture
Well, I don't know about you, but we sure enjoy reading about you torturing yourself.

Honestly: Trying to sand down an Intel IHS to the core, using 220 grit sandpaper was not a very smart idea, as some poeple already told you. But who cares. You learn from mistakes. At least I hope so.
Good luck with the rest of the IHS and some proper sandpaper.