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Decades of paint buildup can make a door rub against the jamb or door stop molding. The fastest way to remove paint buildup is with a sharp stainless steel or carbide scraper. After scraping, sand the door to smooth faux stone 4x4 decking poststhe scraped edges. Use power sanders sparingly—high-speed sanding can melt paint, making it even more difficult to smooth out. Use sandpaper rather than a scraper on metal doors. Chemically strip fiberglass doors if they have flaking paint—you'll quickly ruin a fiberglass door (smooth or wood grain) if you scrape or sand it.You might assume that new paint will hide tiny dents and scratches, but it won't. In fact, the new coat of paint highlights minor flaws. Fill dents less than 1/8 in. deep with spackling compound. For deeper holes, use a two-part filler or an epoxy composite boards used on park benches wood filler. It's more of a hassle to use and you usually end up throwing away a lot of partially hardened filler (mix small batches), but the patch will be hard enough to take a lot of abuse without falling out.Unless the old paint is in perfect condition, you should prime before painting. Primer blocks stains, mutes dark colors and helps new paint stick better. It also seals porous fillers so the topcoat looks smooth decks in puerto ricoand even. Avoid spot priming—it will make the topcoat of paint look blotchy. If you're covering a color or painting on a new color (anything other than white), use a gray-tinted primer instead of a white primer.