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Old 03-12-2007, 07:52 AM
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Default Barnacles on Prop/Shafts/Trim

Just getting ready to finish up the boat and get it back in the water but I wanted to get the last few barnacles off the shafts, prop, and trim tabs of my Pursuit 3000 Express Gas Inboards. Pressure washing got most off but there are still a few determined crustaceons. Any suggestions on the best way to remove them - I heard "Star Brite" (?) has a spray on cleaner but I have not been able to find it. Thanks for any suggestions.
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Old 03-12-2007, 08:24 AM
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Default RE: Barnacles on Prop/Shafts/Trim

On Off hull cleaner. DO NOT BREATHE THE STUFF.
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Old 03-12-2007, 08:33 AM
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Default RE: Barnacles on Prop/Shafts/Trim

How 'bout a scraper and elbow grease?
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Old 03-12-2007, 08:55 AM
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Default Re: Barnacles on Prop/Shafts/Trim

If the props are off just put them in a bucket of straight white vinegar. That should soak off all the calcifications. You can do the same with all the other hardware, but finding containers for them may prove interesting. Worst case is to dig a trench, line it with plastic and fill with vinegar. Then place the shafts in the solution and cover overnight. Totally environmentally friendly.
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Old 03-12-2007, 09:56 AM
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Default Re: Barnacles on Prop/Shafts/Trim

Thanks for the replies. I think the On Off is a muriatic acid derivative and is recommended in other posts on this also. As for the elbow grease - after 6 hrs of cleaning and waxing yesterday I was looking for something to make it easier so I can get a coat of bottom paint on as soon as possible.
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Old 03-12-2007, 10:08 AM
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Default Re: Barnacles on Prop/Shafts/Trim

Quote:
CGaviator - 3/12/2007 9:56 AM

As for the elbow grease - after 6 hrs of cleaning and waxing yesterday I was looking for something to make it easier so I can get a coat of bottom paint on as soon as possible.
I can appreciate that, but honestly a sharp paint scraper is the easiest thing that found for getting barnacles off of metal. Also, 80 grit sandpaper and a palm sander will git 'r done also.
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Old 03-12-2007, 10:25 AM
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Default Re: Barnacles on Prop/Shafts/Trim

Thanks - I was also worried scraping or nicking the curves on the shaft and props. I'm not known for my light touch or finesse!
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Old 03-12-2007, 03:05 PM
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Default Re: Barnacles on Prop/Shafts/Trim

Was doing the same thing yesterday, the barnacles are gone but some very hard residue/growth left over. Used 80 grit on the rudders and struts but will it hurt the props and shafts? Tried it mildly and works but definetly leaves "swirl "marks. Will reasonable sanding damage the metal?

What do prop shops use to get the clean and shiny?
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Old 03-12-2007, 03:40 PM
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Default Re: Barnacles on Prop/Shafts/Trim

Ok I've seen a few things that say there are sprays or vinegar that will remove barnacles? Never heard this before and I can't see how it would remove the shell. I've only heard of blasting, scraping, or sanding to remove barnacles so do this other things really remove them?
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Old 03-12-2007, 03:57 PM
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Default RE: Barnacles on Prop/Shafts/Trim

4 in angle grinder with a wire wheel works for me..

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Old 03-12-2007, 04:35 PM
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Default Re: Barnacles on Prop/Shafts/Trim

Quote:
fishingfun - 3/12/2007 3:40 PMOk I've seen a fewthingsthatsay there are sprays or vinegar thatwill remove barnacles?Neverheardthis before and I can't see how itwould remove the shell.I'veonlyheard of blasting, scraping, orsanding to remove barnacles sodothisother things really removethem?
It'scommonly referred to as "chemistry" You can use any mild acid to removethe calcium deposits.Vinegar just makes it smell like salad and won'tharm the environment.

For paint stripping, use Red Devil lye. Thatwill make your bronze parts clean as a whistle. I guarantee that soakingyour props in lye solution overnight will amaze you. 1 can per 5 gallonswilldo. Won't harm rubber and most plastics.
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Old 03-12-2007, 06:47 PM
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Default RE: Barnacles on Prop/Shafts/Trim

Curious- you're putting it back in the water without antifouling? Since you had growth sounds like you need it..
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Old 03-12-2007, 06:53 PM
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Default Re: Barnacles on Prop/Shafts/Trim

I've got a nice little grinder fitted with a twisted steel wire brush. Pretty aggressive stuff. It works great for taking off stubborn stuff, especially on a hard surface like a stainless steel shaft.
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Old 03-12-2007, 07:45 PM
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Default Re: Barnacles on Prop/Shafts/Trim

Don't paint your props..it will cause drag and possibly cavitation.
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Old 03-13-2007, 07:28 AM
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Default RE: Barnacles on Prop/Shafts/Trim

Thanks for all the replys. I think I'll try the on-off and then a good stiff brush. The anti-fouling and painting will be done this weekend - weather permitting.
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Old 03-13-2007, 11:52 AM
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Default Re: Barnacles on Prop/Shafts/Trim

Try CLR for the residue. You can buy it at most drugstores and hardware stores. It's designed to remove calcium deposits, and that's basically what that barnacle crud is.
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Old 03-13-2007, 12:30 PM
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Default Re: Barnacles on Prop/Shafts/Trim

Calcium carbonate is the residue. Vinegar will dissolve it. So will muriatic acid. If you want to be a bit more aggressive, look in the rust remover section of the hardware store, and some of the paint-on rust removers are mostly phosphoric, (similar to Naval Jelly) and that will really attack the calcium.

I was thinking about the digging a trench idea...another one is a garbage pail. or even a hefty garbage bag.
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Old 09-24-2012, 09:00 AM
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Is this the same as the sun faded look that a white fiberglass gets? For example: I have a custom cooler that the top was fiberglass with speakers in it. I had a sticker on the fiberglass, and when i took the sticker off the area where it was is white...looks like the day i had it made. But the rest of the fiberglass top is almost an orange or light tan/brown color.
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