I don’t think so. Besides if you use an HCL product you need to have a garden hose available with good water supply. The acid will do the trick usually in under 10 minutes and then you should hose the hull down. Start at the bow apply the acid solution to stern one side at a time and the wash down well with hose again starting at the bow. Stain should be gone or considerably diminished. Do again if needed. The stain is in the pores of the gelcoat so you will need such a solution to get in there and dissolve the minute stain particles away. Polishing alone will not be effective
On Mon, Dec 17, 2018 at 2:25 PM Wade Glew via CnC-List < cnc-list@cnc-list.com> wrote: > Is hdrochloric acid bad for the gel coat? > Wade > Oh Boy C&C 33 MKII > Lake of the Woods > > On Mon, Dec 17, 2018, 12:10 dwight veinot via CnC-List < > cnc-list@cnc-list.com wrote: > >> In salt water it comes from iron and manganese ions ever present same as >> you see at the watervlines in some toiler bowls that is why hydrchloric >> acid containing toilet >> bowl cleaners work like magic >> >> On Mon, Dec 17, 2018 at 9:28 AM Hoyt, Mike via CnC-List < >> cnc-list@cnc-list.com> wrote: >> >>> Brian >>> >>> I have been told this is from Tanins in the water. We had a white >>> gelcoat (not painted) boat in an area where a larger river and swamp >>> emptied into a bay. Especially at the bow this brownish/greenish stain was >>> very noticeable. The product On and Off (oxylic acid I believe) tool the >>> stain off very easily. Unfortunately it comes back very quickly. I was >>> informed this was due to the porous nature of the gelcoat. The prevention >>> for this was waxing the hull esp at the waterline with a high quality wax. >>> Once we started being diligent with the waxing the problem went away. >>> >>> ... and when I say came back quickly I mean very quickly. We were >>> visiting Charlottetown, PEI for a regatta and took advantage of their crane >>> to haul to clean bottom. While out I scrubbed the hull above waterline >>> with On and Off and removed the tannin staining. Charlottetown Harbour is >>> where three good sized rivers meet. The stain was back in a bit over 24 >>> hours. >>> >>> Mike >>> Persistence >>> Halifax, NS >>> >>> -----Original Message----- >>> From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of >>> Brien Sadler via CnC-List >>> Sent: Friday, December 14, 2018 1:59 PM >>> To: cnc-list@cnc-list.com >>> Cc: Brien Sadler >>> Subject: Stus-List Hull products >>> >>> I’m looking for suggestions on a product to remove the the brown stain >>> from my water line. Also, any recommendations on hull wax as well. >>> >>> Thanks, >>> >>> Brien Sadler >>> TAZ >>> 1987 C&C 35-3 >>> >>> Sent from my iPhone >>> _______________________________________________ >>> >>> Thanks everyone for supporting this list with your contributions. Each >>> and every one is greatly appreciated. If you want to support the list - >>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>> >>> _______________________________________________ >>> >>> Thanks everyone for supporting this list with your contributions. Each >>> and every one is greatly appreciated. If you want to support the list - >>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>> >>> -- >> Sent from Gmail Mobile >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > -- Sent from Gmail Mobile
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