Veyron showed me a chart comparing Micromesh labels to the US grit equivalent.
Using 2000 Grit Tamiya paper is somewhere between 4000 and 6000 micromesh cloths. Not to harsh really.
This info is on the Micro mesh site.
http://www.sisweb.com/micromesh/conversion.htm
Micro-Mesh Size VS Grit Equivalent Comparison
1500 = 400
1800 = 600
2400 = 800
3200 = 1200
3600 = 1350
4000 = 1500
6000
8000
12000