Yes and the good thing is lapping a CPU is way easier then lapping a HSF.
I actually started off lapping using 400 grit wet and dry and did a circular motion, then rotate 90 and circular again etc.. Then when I moved onto the 1200 grit I did the up/down, rotate 90, up/down, rotate 90 etc.. When I was ready to finish I then did up/down, rotate 180.