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Ok, here are a few blades in BC over different finishes, hope that helps.
<a href="http://zvis.com/knives/knimgtmpl.shtml?/images/knives/fix/bm/bmbc1.jpg" target="_blank"><img src="http://zvis.com/images/knives/fix/bm/bmbc1i.jpg"></a>
From left top to right bottom:
<li>BM 710 - BC over blasted finish. I've sent BT2 coated blade, they blasted it and the applied BC;
<li>BM 770 - BC over satin finish. Factory knife;
<li>BM 730 HS - BC over almost mirror polished finish;
<li>BM 140 HS - BC over mirror polish;
Here's the polished Nimravus before it was sent to get BC coating:
<a href="http://zvis.com/knives/knimgtmpl.shtml?/images/knives/fix/bm/trinimravi1.jpg" target="_blank"><img src="http://zvis.com/images/knives/fix/bm/trinimravi1i.jpg"></a>
2 Nimravi and 710, left Nimravus has BC over mirror polished finifh, right one, BC over blasted and 710 is the same, BC + bt2 blasted off.
<a href="http://zvis.com/knives/knimgtmpl.shtml?/images/knives/fix/bm/bmbc2.jpg" target="_blank"><img src="http://zvis.com/images/knives/fix/bm/bmbc2i.jpg"></a>
And closeup of 710:
<a href="http://zvis.com/knives/knimgtmpl.shtml?/images/knives/fold/bm/bmaxl3.jpg" target="_blank"><img src="http://zvis.com/images/knives/fold/bm/bmaxl3i.jpg"></a>