Sailing Zephyr IV · vídeo

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Dave cleans the propeller and shaft of Zephyr IV after pressure washing leaves behind stubborn barnacle shells.Watch He tests a product labeled Propeller Clean, a mild acid solution, as an alternative to the brass wire brush and electric drill method used previously.0:06 Following the manufacturer's recommendation, he applies the acid with a brush rather than the included spray pump, wearing rubber gloves for protection.0:24 The solution produces a foaming reaction upon contact with the shell remains.0:43 Despite applying two coats and allowing the chemical to sit for 10 minutes, the product fails to dissolve the barnacles on the propeller blades, though it clears the shaft.1:06 A subsequent attempt to wipe the residue away fails, and a scouring pad proves ineffective.1:29 Dave ultimately resorts to manual labor, using a wire brush and 80-grit sandpaper to achieve a clean finish.1:31 Chemical acid cleaners provide incomplete results on heavy barnacle growth and require mechanical abrasion to finish the job.

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