Awww thanks Davina! Polycrylic is like polyurethane except its water based, so it’s much easier to use. It’s easy to find wherever you find paints and stains. As for top coats, I think it depends on the piece. I don’t top coat much, especially when using a good paint, but with these I wanted a good top coat because I was worried the white would get scratched up with a lot of use. Thinks like desktops and tables definitely benefit from a top coat… some signs and stuff hanging on the wall… they’re probably fine without one.