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.
Ever wonder what the difference is between matte, flat, eggshell, pearl, semi-gloss, high-gloss, velvet, satin or pearl when it comes to paint sheens? The seemingly small difference of paint sheen can make a big impact on a room. It can even make the difference between a homeowner loving and hating a paint job! Once the paint colors have been selected it is important to get the right paint. That starts with knowing a bit about paint finishes or sheens.