How to use masking fluid with a broad nib pen to create beautiful letters in white on a watercolor background

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Materials:
Canson 140 lb. watercolor paper (8x10, cut down from a 9x12 pad))
Winsor & Newton Water Coulour Art Masking Fluid
Yasutomo Black Sumi Ink
Speedball C-2 nib (masked letters)
Brause 1½ mm nib (smaller letters)
Moblique pen holder
M. Graham and Daniel Smith watercolors
Watercolor mop brushes, medium and large sizes
Micron felt tip pen size 01