This thread by skipgear shows how to detail an N scale SD45. Skipgear does extensive work on the detailing including grabs, handrails, grilles, and lights. The techniques can be applied to all diesel types. Although it is N scale, the lighting is particularly suited to other scales. There are other modifications, too. This is an excellent tutorial. Here is an example of the workmanship: Additional search terms: kit bash kitbash LED brass solder shell detail blower