Well, I prefer a matte finish on everything, but the aztec style seems to be composed of a combination of matte and satin finishes. (That is to say flat and semi-gloss.)
Because of the 'scale effect', I find that gloss rarely looks right on a model. Even most operational metal-skinned aircraft can look too shiny if purely gloss coated (I have seen exceptions, tho...)
Good luck, whatever you choose -JC