I've made a half-dozen plus bows with glass on the back only. It works fine but don't expect it to perform any better than a hickory or bamboo backed bows.
Built to the same dimensions as a hickory or 'boo backed bow it will behave the pretty much the same. I made them with osage, Ipe, hickory and bamboo-flooring as the cores...the bows made with the boo-floor were duds but so have the hickory backed bows I made using the flooring.
I've used both smooth-on and Urac and each worked well...at least none have delaminated. IMO it is a good way to make an inexpensive, durable bow.
**I used the natural "core tuff" glass and the last time I bought some it was only about $9 per.