1: 30K is to fast for any type of wax, most of us run much slower spindle speeds somewhere in the 12,000 r.p.m. range.
2: Have you looked at the surface under magnification, the wax may be melting.
3: 40% step over is a lot, scaling back to .0015 would give a better finish.
4: Your feed rate is slower than what most of us run, 32 to 45 ipm.
5: Drip feeding or misting coolant is beneficial for some of the guys however I never use it.
6: A toothbrush does a mediocre job removing compaction, do yourself a GIGANTIC FAVOR and purchase a Bab's spot cleaning gun.
Valley Litho has great prices on them.
7: Join the 3dcadjewelry.com forum, some of the worlds most talented CNC Cad Cam jewelry designers are members.