Relaying surface finishes to manufactures specifically rigid polyurethane

Hey guys just like the title implies I’m trying to get my part mass produced and I’m hesitant only because I don’t know how to let them know the surface has a very textural finish. What would the best way to do this?

Would you just say to them I’d like this level of grit?


This size grain thickness uniformly coated?

I wouldn’t think you would model this texture in cad, I’m just wondering how I would approach this.