Aluminum siding takes paint well once its chalky oxidized surface and any oil are removed. Benjamin Moore's current Aura exterior data sheet calls for cleaning metal of contaminants, dulling shiny areas and lists the paint as self-priming on nonferrous metal such as aluminum, applied down to 35°F.
The factory finish on aluminum siding weathers into a fine powder over the years. Rub a hand across a sunny wall and color comes off. That chalk has to go: Benjamin Moore's Aura exterior data sheet requires surfaces free of chalk, oil, grease, wax and loose paint before painting, and paint applied over chalk bonds to powder instead of the siding.
Usually not with a self-priming acrylic. Benjamin Moore lists Aura exterior as self-priming on most properly prepared substrates including nonferrous metals, and its Fresh Start High-Hiding All Purpose Primer is listed for exterior aluminum where a primer is wanted, for example over bare spots or for a big color change. Steel trim or rusted fasteners are ferrous metal and need a rust-inhibiting metal primer.
Smooth metal siding sits toward the efficient end of a paint's spread rate. Benjamin Moore lists 350 to 450 square feet per gallon for Aura exterior at a dry film of 1.4 to 1.8 mils. For 1,800 square feet of siding painted twice, that is 3,600 square feet of coverage, or roughly 8 to 10 gallons, before trim and soffits.
Small dents can be filled, but painting will not hide large ones; paint shows the shape of the panel. Loose or buckled panels are refastened before painting. Matching replacement panels is often hard for older aluminum siding, which is one reason homeowners paint rather than patch.
Benjamin Moore's current Aura exterior sheet allows application at 35°F to 100°F surface temperature, and metal heats quickly in sun, so walls in direct afternoon sun can exceed the maximum on hot days. NOAA's 1991-2020 normals for Lehigh Valley International Airport put the median first fall freeze on October 24.
Aluminum trim coil, soffits and gutters are prepared the same way as aluminum siding: washed, degreased where needed and dulled where shiny. Benjamin Moore lists Aura exterior as self-priming on nonferrous metal. Vented soffits are painted carefully so vents do not clog, and gutters are cleaned inside first so runoff does not streak fresh paint.
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Yes. Aluminum siding is a good painting surface once it is cleaned of chalk, dirt and oil. Benjamin Moore's Aura exterior data sheet calls for cleaning metal of contaminants and dulling shiny surfaces, and lists Aura as self-priming on nonferrous metals such as aluminum. Two finish coats give an even, durable film.
Wash it. A cleaner and a soft brush or low-pressure rinse removes the powdery oxidized layer, followed by thorough rinsing. Benjamin Moore lists its Woodluxe All-In-One Wood Cleaner for vinyl and other exterior surfaces as well as wood. Test by rubbing a dry hand on the wall after washing; if color still comes off, wash again before painting.
It depends on prep, sun exposure and color, but properly cleaned aluminum painted with a premium exterior acrylic holds paint well because metal does not swell and shrink with moisture the way wood does. Chalk left on the surface is the main reason paint fails early, so washing and a dry, clean surface matter more than the product.
Yes, aluminum does not warp the way vinyl can, but dark colors absorb more heat and the metal expands and contracts more. Paint applied in strong sun on a dark color can also exceed the 100°F maximum surface temperature Benjamin Moore lists for Aura exterior. Painting shaded walls first and avoiding peak sun helps.
Sources: Benjamin Moore Aura Waterborne Exterior Soft Gloss (N632) technical data sheet; Benjamin Moore Fresh Start High-Hiding All Purpose Primer (046) technical data sheet; Benjamin Moore Woodluxe All-In-One Wood Cleaner (018) technical data sheet; NOAA NCEI 1991-2020 Climate Normals, Lehigh Valley International Airport (USW00014737). Figures checked October 2026.
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