I am making a dining wood/polished concrete table which will have a resin finish. My question is whether there is a grade of finish in resin like paint ie can it go from a matt finish semi gloss low sheen or is it all that high gloss mirror effect?
Resin poured onto a flat surface will always give a glossy finish assuming it is mixed properly. If you want something either than the gloss finish, you can go over the surface with wet/dry sandpaper. Something in the 400 to 600 grit range will give it a matte finish, while 800 to 1000 grit will give it a satin finish. I would suggest testing a few pieces with sandpaper first to see what you like.