Start of the shift stage 4

I need to darken and merge the right hand top corner so I tilt the board at the angle shown and lay a bead of French ultra and ultra violet. After travelling down to near the arch, I further tilt the board and get the remaining bead to diffuse by spraying it with a water spray. Failing this, you could soften it away with a brush and clean water, but be rapid and gentle or you will disturb the underwashes.