Painting On Galvanized Metal Is Not The Same As Regular Steel
Galvanized metal has a coating of zinc on it to prevent rusting. If the galvanized surface is new or unweathered, wash and thoroughly rinse it before painting. This step is necessary to clean off any oily residue left from the galvanizing process. When purchasing your unfinished galvanized metal stars from us this step has already been completed for you.
Apply a quality exterior latex or oil based primer made for galvanized metal. For regular steel is not necessary to make sure the primer is made for galvanized. Without an appropriate primer your paint can lose its adhesion and substantially last a short time frame.
If the galvanized surface is weathered and unpainted, clean and rinse off any dirt and remove any corrosion with a nonmetallic scouring pad. Then apply a metal primer and top quality exterior acrylic latex or oil based paint.
How Many Coats?
When it comes to the number of coats of primer and paint to apply to metal, the cardinal rule is to follow the recommendations of the coating manufacturer. In general, however, one coat of primer is normally sufficient, although application of a second coat insures complete coverage and maximum protection in demanding situations.
Two coats of a topcoat are generally recommended rather than a single coat for two reasons: increased overall thickness of the coating for better durability, and elimination of the possibility of any pinholes extending through the coating.
In addition, always apply primer and paint to metal in thick coats for optimum durability and resistance. That’s because the thicker the coat, the less chance of moisture penetrating the paint and reaching the substrate. Brushing is fine for small applications, while rolling and spraying are better for covering large areas.
Direct-To-Metal Coatings:
Another option when painting your galvanized metal barn star is Direct-To-Metal (DTM) coatings. These coatings are designed for direct application to metals without the use of a primer. They function as both primer and topcoat in one product.
DTM coatings can be used for a variety of applications, are available in semi gloss or gloss formulations, and are now offered in high performance latex products. To ensure proper protection of the metal, two thick coats are usually recommended.
Regardless of whether you use a DTM coating or a primer-topcoat system, it is not difficult to get years of reliable service from your galvanized metal barn star paint job. The keys are taking the time to properly prepare the surface, promptly priming the surface, and applying thick coats of the right type of coating.
Primed Stars
Metal Barn Stars provide you with unfinished stars or primed stars for your convenience. For the primed stars you can rest assured we use an industrial strength primer ready for your latex or oil based paints.
More Help Available:
If you need more help with the preparation and painting of your unfinished metal or galvanized barn stars please don't hesitate to contact us at info@MetalBarnStars.com, toll free 1-877-229-8488, and our contact page.
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