Here's a new one for me: I have sprayed a good bit of lacquer in my sculpture work over the years. Yesterday something happened I have never seen before. I had four coats of color and four coats of clear on a piece made of cold rolled steel. I sanded it with 600 paper and clean water as always, wiped it down good with water, and set it out in the sun to dry for a couple of hours. I wiped it with the same tack rag I used on it two days before that was stored in a sealed jar. The surface looked perfect. When I sprayed a coat of clear on it the stuff started beading up into a radical orange peel, but only on the surfaces that face up and to the side. The surfaces that face downward were unaffected. Something obviously came down out of the air and landed on the sculpture. But what? It was a warm cloudless day, maybe 75 degrees, and very low humidity. A man was putting a water based asphalt on a roof about a hundred feet away with a mop, not a spray. He had used a solvent based compound on the roof of my shop the day before. But I had been spraying the previous coats while this was going on with no problem. I checked the lacquer by spraying something else and it went on fine.
What could possibly have come out of nowhere and settled in an invisible film on the sculpture
??
R
11-01-2009, 01:44 AM
Laquer disaster
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