A Green Card holder who is not a minor can file Form N-400, Application for Naturalization, to obtain US citizenship. Similarly, he must have become a permanent resident before five years and must have remained as a permanent resident in America for at least five long years.
Now, flat paint is (usually) a latex paint that dries without a reflective finish-that's it-the finish is smoother (imho) than chalk paint. Chalk paint really dries quickly and it has a rough texture to it after it dries. Many people use wax or poly-acrylic sealant on top of their furniture piece to keep the paint from peeling. So there ya go, my best explanation.
Choose between flat/matte, glossy and satin finishes. Flat/matte finish: A flat finish hides imperfections better than a glossier finish but doesnât clean as well. Flat finishes are generally used for siding. Glossy finish: Glossy paint creates a hard, shiny, durable finish that is easy to clean.