[Spyda]

i used 400, 600, 800 and 1000 grit sand paper

used each grit, starting with the roughest for about 20 mins each, sanding in one direction about 40 times, turning 90 degrees wetting the sandpaper, 40 times 90 degrees until id turned the hole heatsink round about 3 times fully

then i moved on to the next grade, and repeated the process. at the end it had a very good reflection and was totally flat,

then i did the same for my P4, i sanded it until all the aluminium was gone and the copper showed through all over, i needed a LOT less AS3, i scraped like all of it off with a credit card