(hint #1) Being able to play whatever I want has been a central theme to my own discovering how to play guitar. I've been on that path for 37 years, and it's enabled me to uncover, test and refine a unique, skill generating learning approach.
It is important to note that urethane foam is most commonly used to refer to a material made from polyurethane. The urethane reference in this name is to the type of links, also known as carbamates, that join the units in polyurethane.
The production of industrial products like paints, adhesive agents, curing agents, foams, and resins make use of either epoxy or urethane components. Because of these components, we are able to make these useful industrial products. Without paints, we would not be able to make the world a colorful place to live in.