One more thing – create a copy of our painting layer and use This Filter.

painting business

Result:

painting business

Set master Opacity/Flow100%/15% +set the mode to Exclusion. Moreover erase our base character and background
 
female character.

painting business

Use a little bit of BLUR more.

Results:

painting business

Oh – one more thing – save and flatten the image. Then use texture in the Filter menu.

painting business