After the yellow is shot up to 100% density, I use a plastic razer blade to gently lift the masking film pieces. You can use an Exacto to lift them, but you get a lot of little pick marks with a blade. The plastic razer blade won't do that. I bought a life time supply off Ebay for a few bucks. A sign shop may have them as well. They make a huge difference lifting masking film.

After I lift all the little letters, this is what we have.

I hit the letters lightly with 600 wet paper to knock down the ridges.

What I then do is now come back and dust on yellow over the letters to knock the white back. The more you lay on, the less you will see them when done.

Next I lay on a ultra thin coat of orange starting heavy on the leading edge and fade it back to pure yellow. I shoot this right over the letters.

You can see how subtle they are. They will stand out more when the clear goes on.

The reason you want to bring up your base coat around the ghost graphics to 100% is to avoid halos or rings. If you didn't have your base up to 100% density (saturation), when you paint just the ghost graphics it could make that area darker.