It is time for some stains. Duplicate burned style layer and clear it. Then go to "General Blending" and replace "Color Burn" with "Pin Light". Try the brush now. It is better to draw with a dark grey color and an irregular brush.
Step 13:
No work without scratches of course. Duplicate burned style layer that we created in "Step 11" and clear it. Then go to layer style and replace "Color Burn" in "General Blending" with "Normal". Now we can use white color and small brush to add some scratches. Scratch paper in burned areas just for a nice look or near the torn edges to define the thickness of paper.
Step 14:
Create a new layer and draw some color variation on our sheet. I used green color in the corners but it is only my vision for old paper. It definitely has some variation. Then play with opacity of it.
