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Expert's Corner — dries

TIP: Understanding Gloss and Satin

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TIP: Understanding Gloss and Satin

It’s the last coat you apply that establishes the sheen of your finish. In other words, if the sheen you’re getting is not to your liking, just apply another coat of finish on top with the sheen you want, and that’s what you’ll get. Sheens range from high gloss to dead flat. Gloss reflects an image almost like a mirror. Flat disrupts the image so much that you may not be able to see it at all. All finishes except gloss contain flatting agent that is responsible for the flatter look. This flatting agent (tiny particles of silica, which you...

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TIP: Oil and Spontaneous Combustion

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Drying oils, especially linseed oil, are the only finishing materials that spontaneously combust. Solvents don’t spontaneously combust, paint strippers (including paint or finish residue) don’t spontaneously combust, and no type of varnish spontaneously combusts. It’s not totally clear whether 100% tung oil can spontaneously combust, so treat it like it does. As linseed oil dries, it generates heat as a byproduct. If you wad up linseed-oil rags or pile them on top of each other, the heat generated in the middle can’t dissipate. It builds up until it reaches the flash point of the cloth and it bursts into flame....

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