Trimming the Color Separations on Keokuk Junction FP9 1752

Here I am trimming the separations on Keokuk Junction FP9 1752.  It is important to trim each color separation with a fine-tip pen before using the brush pen to fill.
F-units such as the Keokuk Junction locomotive often have stripes and many color separations.  Trimming the edges of each separation allows you to fill each area with confidence.
Confidence with the brush tip reduces the amount of brush strokes.  When each separation is clearly marked, it is much easier to paint accurately.  Enjoy drawing trains.