Yes you can set up the TEK-LOK for horizontal carry of the sheath. My personal favorite method of carry for the CQB1 is appendix draw IWB using either the supplied IWB loop, or the the supplied 'para-cord' used as a static cord or 'rip cord'. THis allows me to carry the full sized CQB1 concealed with ease on a daily basis.
We do not offer the CQB with a coated blade, because the full tang construction. If you coated the blade[and tang of course], when you 'blended' the scales to match the tang with a smooth, hand fitted juncture, you would destroy the coating in places. In short, it would look terrible. THe finish we use, CUDA Slik-Matte, is not just a bead blast finish. We high impact, vibratory tumble the whole knife first,...then we lightly ceramic bead blast over the stonewash. This gives the scales thier unique feel, and gives the ATS-34 a silky smooth 'french grey' uniform finish. The surface of the steel is smoothly 'peened', not roughly broken-up, like regular beead blast. This finish retards surface corrosion, instead of inviting it.
Hope this helps,....lemme know if you need any more info.!