Have you ever used something called Liquid Glass epoxy for craft projects?

I recently went to an Adirondack furniture store (custom made furniture). The items had an incredible glassy sheen and as someone who does decoupage, I was curious how the artisan gets such an incredibly smooth finish from what I assumed was polyurethane. I asked him and he told me it’s something called Liquid Glass which is an epoxy. He told me not to confuse it with Liquid Glass for autos.

I’ve googled it and learned more about it, and I would like to try using it for my decoupage (which is just a hobby, nothing that I sell) but wanted to hear from anybody who may have used it, and what it’s like to use.