two things I'd suggest:
1. Make sure your heat sink is flat before you polish it. If it's already really flat, polishing is a good idea. Getting it flat i.e. removing any extrusion, casting or machining marks first is probably more important than a super polished surface. Remember, the goal is to bring the hsf surface into intimate contact with the flat core. If the hsf's shiny but not flat, you will have a gap. That's not good.
2. Make sure you remove any waxy material left on the base when you're done polishing. I think theres often some waxy binder in the rouge. You want nothing but that super thin layer of Arctic Silver between the hsf base and the core.
Have fun, and don't it get all over the CPU :smile: .
the more I learn, the less I'm sure I know...