Cleaning Black-white-stroked SFX

To Clean that type of Special Effects that have a white stroke already, from the RAW. This is the simplest safest way to clean them,

First Select the Black SFX with Wand Tool (Press "w" on your keyboard).

Then go to Select > Modify > Expand

Input the Expand Pixel size, Usually I only need to use 1px.

As you can see the Black Japanese Text have been selected, while still inside the white stroke.
With your White Brush, brush over the selected area. Brushin them is easy now as you can only brush inside the selected area.

After you have brush them, all you need to do now is Clone/Re-Texture/Redraw, what ever it overlayed.