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Jan 23rd, 2013
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Water spots on black cowling #13577243 05/31/20 03:09 PM
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n_fish Offline OP
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Looking for some advise on how to remove some spots on a black Mercury cowling. I used some wax and rubbed the spots with little success. I was curious if a dose of rubbing compound will remove them or cause noticeable damage to the finish. Any tips are much appreciated and thanks.

Re: Water spots on black cowling [Re: n_fish] #13577249 05/31/20 03:16 PM
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boocat Offline
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9% white vinegar? But I'm surprised the wax didn't work.

Re: Water spots on black cowling [Re: n_fish] #13577552 05/31/20 09:14 PM
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Dayne Offline
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The best thing I have found is hydrochloric acid. I get it in a diluted form in a product called Purekleen. I’ve been using it for 2 years. I spray it on wipe it with a wet bench brush rinse it off and go in the house. I imagine toilet bowl cleaner would also work but I haven’t tried it.

Re: Water spots on black cowling [Re: n_fish] #13577559 05/31/20 09:25 PM
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tmd11111 Offline
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Lime-a-way. Spray it on dry surface, wipe with a wet sponge then rinse. Wax afterwards.

Re: Water spots on black cowling [Re: tmd11111] #13577621 05/31/20 10:30 PM
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n_fish Offline OP
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Thanks

Re: Water spots on black cowling [Re: n_fish] #13578150 06/01/20 01:02 PM
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basscaster46 Offline
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Lemon pledge


Drug induced moment of absolute mental clarity
Re: Water spots on black cowling [Re: n_fish] #13586612 06/07/20 11:47 PM
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4Weight Offline
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I use the Starbrite boat guard. Great on scum line, metal flake and on my cowling. Good stuff.


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Re: Water spots on black cowling [Re: n_fish] #13586617 06/07/20 11:50 PM
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kennerdude Online Content
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50/50 9% vinegar and distilled H2o. Using this for yrs without issues. Spray wax after.

Re: Water spots on black cowling [Re: n_fish] #13616449 07/02/20 04:20 PM
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blackhorse Offline
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HOT SAUCE WORKS GREAT

Re: Water spots on black cowling [Re: n_fish] #13620672 07/06/20 01:38 PM
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Whaler-170 Offline
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Ducky’s water spot remover has worked the best for me. Especially on the mercury cowlings.

Re: Water spots on black cowling [Re: n_fish] #13621060 07/06/20 05:30 PM
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TomRom Offline
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Yep. Ducky's is what I use.

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