Plaster debate continues.(Letters)(Letter to the Editor)

From: Pool & Spa News | Date: February 28, 2005| Author: | Copyright information

The recent letter by the Cal Poly professors (Jan. 17 issue, page 10) illustrates why there is confusion in our industry about the plaster spotting issue.

The central point is this: Aggressive water etches plaster uniformly, but spotted plaster is not etched. Instead, pool plasterers can cause "soft spots" (formerly and improperly called "spot etching") with improper plastering practices, leaving these areas very porous and susceptible to even balanced water.

Once this is understood, it becomes apparent that the Cal Poly professors have not been provided with all of the ...

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