oh! I was only trying to say the paints are quite common (and cheap), not special wash or inks from rare brands etc.
My only advice would be try to avoid drybrush as much as you can. I think is the big temptation when painting mummies, is fast and effective but I don't like the final look, if abused the mummy looks more like covered in plaster than wrapped in bandages.
I paste here a helpful pict i used as reference for the bandages (no idea about the source of the image)