I also added aluminum tape to the back of the paper interior to direct light back to
the engines.
You may either drill the holes in the grills or use ParaGrafix photo-etch. Follow their
instructions for prepping the parts.
You may use .015” or thinner clear polystyrene sheet to place behind the grills. Use clear flat
acrylic paint or sand paper to diffuse the light. This will help hide the LEDs.
Place your clear plastic over the part and trace the shape. Cut out with scissors.
Always test with lighting before gluing them permanently to the back of the grills.
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