I think before someone plays with slurry on a coticule they should work on the final finish. Taking a 8k/12k edge razor doing water only laps and just seeing where that gets you. After they have very good idea of what it is like finishing then moving to slurry. I believe water only passes is usually enough to bring an edge back to life on most coticules. Although I have only used 4-5 different coticules with 2 I liked