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2. The Hidden Meaning Behind Purple Fence Posts and the ... - AOL

   www.aol.com/lifestyle/hidden-meaning-behind...

   Painting a fence post purple sends a clear message to keep out of a property without relying on the actual words. Unlike a sign that can become stolen or unreadable over time, the purple paint ...

3. Spray paint - Wikipedia

   en.wikipedia.org/wiki/Spray_paint

   Spray paint is a popular medium among graffiti artists due of its portability, permanence, and speed. The product's presence in the United States goes back to 1949, when it was designed with the purpose of painting radiators with aluminum paint. [5] Speed, portability, and permanence make aerosol paint a common graffiti medium.

4. Superhydrophobic coating - Wikipedia

   en.wikipedia.org/wiki/Superhydrophobic_coating

   Superhydrophobic coating. A superhydrophobic coating is a thin surface layer that repels water. It is made from superhydrophobic ( ultrahydrophobicity) materials. Droplets hitting this kind of coating can fully rebound. [1] [2] Generally speaking, superhydrophobic coatings are made from composite materials where one component provides the ...

5. Lead-based paint in the United States - Wikipedia

   en.wikipedia.org/wiki/Lead-based_paint_in_the...

   The District of Columbia defines "lead-based paint" as any "paint, surface coating that contains lead equal to or exceeding 0.7 milligram per square centimeter (0.7 mg/cm2) or 0.5% by weight." [9] This is more stringent than the HUD lead-based paint standard of 1.0 mg/cm2) . Some states have adopted this or similar definitions of "lead-based ...

6. Spray painting - Wikipedia

   en.wikipedia.org/wiki/Spray_painting

   Spray painting is a painting technique in which a device sprays coating material (paint, ink, varnish, etc.) through the air onto a surface. The most common types employ compressed gas—usually air —to atomize and direct the paint particles. Spray guns evolved from airbrushes, and the two are usually distinguished by their size and the size ...

7. Phosphate conversion coating - Wikipedia

   en.wikipedia.org/wiki/Phosphate_conversion_coating

   Phosphate conversion coating. Phosphate conversion coating is a chemical treatment applied to steel parts that creates a thin adhering layer of iron, zinc, or manganese phosphates, to achieve corrosion resistance, lubrication, or as a foundation for subsequent coatings or painting. [1] [2] [3] It is one of the most common types of conversion ...