Originally Posted by
Razorburne
you can used wet/dry sandpaper (quality: Norton of 3m brand) on a flat surface - as demonstrated in the wiki, you can do it on a flat tile of countertop...use the sandpaper wet of course.
if you don't mind paying a little extra, you can get a DMT course plate from lots of vendors including SRD...the diamond plate is perfectly flat itself and never needs lapping (unlike the Norton flattening stone). I have yet to use one, but using very light pressure, I hear this thing laps quickly like it's no one's business
:gl: