I’ve got plenty on mine. It was used in the ocean off California for years. I thought it was etching since nothing I tried did any good but you’ve got me thinking it’s probably mineral deposits from the sea water. Vinigar is good on minerals and the steel wool would be good for cutting/scraping them off when softened. I’m going to try that.
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 Scott, Portland, OR '85 V-20 I/O, Merc 170
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