OK, got some micromesh, but I don't seem to know how to use it.

I started with the smallest grit (1200), which they say is equivalent to 600 grit sandpaper.

When I use it, it smooths the wood, but seems to leave a black stain (for lack of a better term) in the pores. I have been using cherry, but now want to do some maple pens.

How do I keep the micromesh from staining my wood black?

Any thoughts or suggestions appreciated.