Re: Metallic Paint - a few questions ???

Posted by Ken McWilliams on November 03, 2000 at 04:05:43 from (38.232.245.127):

In Reply to: Metallic Paint - a few questions ??? posted by Alberta Mike on November 02, 2000 at 19:34:32:

Mike,

The earliest metallics that I recall are in the late 50's for autos.

The metallic is flaked metal - aluminum, I think. The size can vary to give different effects.

Usually the paint used with a metallic is a colored tranparent paint. Thus, a blue metallic is a blue transparent paint with the metallic flakes.

Some "candy apple" colors will be sprayed with the flake in a clear paint, and then the tinted color over it. It will give a deep appearance.

Metallics should have a clear overcoat. As the metallic paint ages, the flakes become exposed. When this happens, the metallic flakes will oxidize or stain. Bird droppings are especially bad on non-clear coated metallics. The acidity in the droppings will react with the flakes and result with permanent stain in spots.

I've painted several cars and trucks with metallic. It is more difficult to spray. The slightest amount too much and the metallic flakes will "run" because they are heavier than the base paint. The surface can be great, but the flakes "run" inside the paint layer. Another reason for clear overcoating to keep the metallic layers light for better appearance, and then clear coat which is somewhat more forgiving.

I don't know of any tractors. The non-metallic paints usually are more durable and easier to apply. The non-metallics can be applied easily through dipping, electrostatic deposition, or conventional spray. The non-metallics can be fusion flowed and cured.

Ken McWilliams
Dayton, OH

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