Add me to the list of those who use two-part epoxies. I like Envirotex, but Swing Paints makes a good product called New Luster 55 or something like that.
I top the smooth layer with gel gloss medium to get a more wavy look. I also add tiny drops of craft paints and some plaster of Paris powder to the epoxy so that it looks silted a bit, or at least turbid and semi-translucent.