^^ Did you augment the gridlines in some way? Or is it the lighting?
I think the too-many coats of clearcoat may have "piled up" on the surface of the saucer and made the grid look deeper! Otherwise, I streaked dark gray chalk pastel weathering backward from each radial gridline. I added the circumfrential seamlines around the 2ndary hull and nacelles to add a little extra visual interest. Those were NOT on the original, but I like them. I tired to keep the pastel work subtle and unMeireckie-like.