If you paint with 50% gray on the composite layer, the sharpening is erased.
Be sure to check off as you go along.
1) Sharpen the composite layer using High Pass Filter Sharpening.
Do the following.
a) Double click on the foreground color icon.
The Color Picker window will open.
b) Enter 808080 in the # box.
c) Click OK.
Use a feathered brush.
If you haven't already done so, go to Feathered Brush.