aaaand here's the rest of the (good) seamless textures I've made, various washes and marker scribbles on different kinds of paper I've scanned. Most of these I've use on brushes but they could be used for overlays too.
Like with the others, make sure you adjust scale and use levels to make them do what you want. Note that these ones will also become hideous if tiled at a small scale.
They're totally free to use, don't worry about credit.














