Thanks for these variants! Here's one from BC, Canada, collected by Phil Thomas, from an anonymous telephone caller, c. 1965 in Victoria:

We are the boys of the old Rainbow
We are the boys to cut a shine
We know our manners we spend our tanners
We are respected wherever we go
When we're marching down Esquimalt Road
Doors and windows open wide
We can dance and we can sing
We can do the highland fling
For we are the Rainbow boys

Esquimalt Road leads to the Royal Canadian Navy base. The Rainbow was one half of the RCN c. 1915

Jon Bartlett