So if I have a rooster golden comet and a hen golden comet can I breed them to get more or do I have to actually cross a deleware and a R.I.R?
They are a Golden Sex Link and sex links do not breed true. So you can breed them but you won't be able to tell sex by coloring at hatch.
From my understanding the Golden Comet is just one of the names for Golden Sex links. Other names are Golden Buff, Cinnamon Queen and I think there are a few others. There are a couple crosses that different hatcheries use to get the Golden Sex Link. This is my girl, Luna. She is a 7 week old Golden Buff (Meyers Hatchery's variety of Golden Sex Link). She is my favorite. Affectionate, curious, brave and top chick without being mean to the others.