Filing early will decrease how much money you receive each month. Use a benefit calculator to figure out the difference in your case. Accrue delayed retirement credits. For each month between age 62 and age 70 that you wait to apply for RIB, Social Security will increase your benefits by a certain percentage.
Google it. Definition: Coated paper with a dull, no-gloss finish without luster is known as matte finish. Colors often appear softer on a matte finish. Text can be easier to read on matte finish papers than on glossier finishes.
Mill Finish is a very lightly oxidized film and will wipe off with your bare finger and immediately form. Rolled sheet would probably have a thinner oxide than hot extruded aluminum. If you want to bond silicone adhesive then you want a phosphate etch, or a light chromate or a thin (.0004 anodize in either chromic, sulfuric, or phosphoric.)