How to make tinted tail lights and turn signals on HO scale automobiles By Jenny Freeland | September 20, 2011 | Last updated on November 7, 2022 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Having trouble viewing this video? Please visit our Video FAQ page Model Railroader associate editor Cody Grivno shows how to use MicroScale Kristal Klear and food coloring to make tinted tail lights and turn signals for your vehicle.