473 was actually painted in Bumblebee colors well before the San Juan was discontinued.
She was still painted that way during the days when the D&RGW was forced to continue service between Chama and Dulce after the end of passenger service on the division. 473 and combine #212 were the regular equipment on the run, as I recall.
Until 473 was shopped during the Bradshaw era, 473's brass bands were still visible on the sand dome, under black paint. Look closely, modelers. You'll see them.
Happy new year.
Mike