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Removing 3M 4200 #12306811 06/22/17 08:10 PM
Joined: May 2017
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ROT Angler Offline OP
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I was resealing the thru hull fittings on my boat the other day and things got a little messy and I didn't notice that I left behind a small palm print. What is the best way to remove 3M 4200 without damaging the gelcoat? Is there a chemical that is safe to use, or should I carefully try to wet sand the area? I tried the search engine and didn't get any hits, thanks in advance for any replies.

Re: Removing 3M 4200 [Re: ROT Angler] #12307007 06/22/17 09:46 PM
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CADD Offline
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C4 or good amount of Dynamite... 3M makes softener/remover but costly I'd guess and probably have order it. At least it's not 5200 smile might try a razor?


2001 Pathfinder 2200V 150Vmax HDPI
2015 Diablo Amigo (Sand Fleck)

Re: Removing 3M 4200 [Re: ROT Angler] #12307276 06/23/17 12:27 AM
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gary purdy Offline
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I would try WD40 first.


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Re: Removing 3M 4200 [Re: ROT Angler] #12307558 06/23/17 03:24 AM
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grout-scout Offline
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Should just rub off with your fingers, with a little pressure.

Re: Removing 3M 4200 [Re: ROT Angler] #12307645 06/23/17 04:54 AM
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Bobby Milam Offline
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If you have a multi tool with the scraper blade, it will take it off very easily in one piece with no damage to boat if you keep it flat

Re: Removing 3M 4200 [Re: ROT Angler] #12307781 06/23/17 12:35 PM
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steve@S2Marine Offline
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i use a razor blade/scrapper and acetone.


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Re: Removing 3M 4200 [Re: ROT Angler] #12307932 06/23/17 02:21 PM
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ringer Offline
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There is a spray called Unhesive that got my jackplate off and that was on with 5200. Glass shop said they would have to tear it off and repair the broken glass. The stuff works.

Re: Removing 3M 4200 [Re: ROT Angler] #12308602 06/23/17 09:16 PM
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I may start with a little WD-40, I also read about Unibond Sealant Remover if I can find it. I'll check on the Unhesive too and see if anyone carries. It's a real thin spot so it's hard to get under it with a blade to try and pop it off, I haven't been able to get any good C4 in years, maybe I can use a little tannerite and hit it with the AR. Thanks again for the suggestions.

Re: Removing 3M 4200 [Re: ROT Angler] #12308844 06/23/17 11:51 PM
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"I haven't been able to get any good C4 in years, maybe I can use a little tannerite and hit it with the AR."

smile the stuff can be unreal on how strong it is, good luck!


2001 Pathfinder 2200V 150Vmax HDPI
2015 Diablo Amigo (Sand Fleck)

Re: Removing 3M 4200 [Re: steve@S2Marine] #12308931 06/24/17 01:25 AM
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Chris B Offline
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Originally Posted By: steve@hydrodynamics
i use a razor blade/scrapper and acetone.

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