2. Lapping:
I’m sure there is a guide on this site and I read others, also watching 2 u-tubes on this topic. I obtained the following grades of sandpaper from my local chain hardware store “Bunnings”, but even better was my local chain automotive parts store “Super Cheap Auto”;
Naturally after writing this (and thus completing the project) an article of interest appears from "freecableguy" (who is that masked man) on lapping a LGA775. Frankly he is an Electrical Engineer (I'm an Enviro Sci myself) and writes some of the most technically detailed articles I have read to date, but sadly he has ""disappeared"" and it is a great loss to the PC community;
How to lap the Intel LGA775 IHS flat - The Tech Repository Forums
Previous research efforts made me adopt a method of (whereis FCG!
);
·Slightly wetting the paper with soapy water;
·Sliding back and forth, applying light pressure (a stable pressure to maintain flush surface contact, but not “force”) for 10 times then rotating 90˚ and repeat for ~4 complete revolutions.
·Polishing
·Cleaning with alcohol
The CNPS9500 had an exceptional “finish” from start and I think I may have actually degraded its’ surface in the process, albeit slightly. Whereas the CPU and SB HS had obvious lateral micro lines (grain) running across them (clearly visible to the naked eye).
After the final grade (2000) I was surprised to note obvious micro scratches still present and the guides I had read aren’t very clear on the “final finish”, with most not discussing the polishing and buffing (you could almost believe the sandpaper alone will give you the finish, with some). Thankfully I had a metal polish lying around and was able to buff out the vast majority of micro scratches and obtain a “very good” finish (next time will be even better).