Thank you! I was pleasantly surprised with the outcome. I was kinda just working with the paints I had on hand so ended up base coating with a slightly warm brown, valejo natural wood or something like that. Then I just added a little white at a time up to something flesh like. For the actual painting, I really tried to bring up the raised areas with the lighter shades while leaving the dark in the contours. I I used wyldwood contrast from citadel (a dark brown) like a wash around the eyes and cleaned things up with my previously mixed skin tone. The eyes wasn't anything fancy, an off white, black and a steady hand. Getting the pupils lined up took a few tries, and I got them close but they are definitely not the same size on both. Fine enough on a table, but noticeable up close.

My Tyranids are purple, but gaunts are a pretty good way to practise anything organic/flesh and even with the different colours, the principles were all the same.