Our fireplace have been in our foyer for a while, but it's first now we can call it done, when the surface has been missing the right touch.
To get the right style we first used signal red spray all over the plate. After the color dried, I used sandpaper and paint thinner to scrub away some color, owensoot to make it darker and dirtier and salt water to give the surface some rust.
The fireplace is actually working when we are using bio fuel in three small tanks under the surface.
The final result become pretty close to my rough 3D sketch, even if it looked pretty bad.