I painted the channel and lettering, then taped over it when dry.
Then rubbed a screwdriver handle onto the tape, to make sure the tape was firmly on the top surface.
Then I shaved the tape from the channel perimeter with a single edge razor, to leave tape IN the channel, to complete the Black painting on the surface.
I used a sanding block over the lettering, to remove tape AND excess Red, from the lettering, and leave the tape IN the lettering.
After finishing the Black, I pulled the tape from the lettering with a straight pin, and pulled the channel tape easily.
Here, the tape is still in the lettering, ready for a straight pin.
