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Removing bottom paint at home

Old 05-24-2019, 08:28 AM
  #21  
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Originally Posted by wingless View Post
Not a horrible job w/ the correct equipment.

When I do this on my 2000 380 Searay Sundancer I use my Festool RO150FEQ and their HEPA dust extraction system.

It is a very clean process w/ almost zero exterior dust.

Even though, I always wear a dust mask and goggles, just in-case, because bottom paint is sooo toxic. Same also when bottom painting, but I then also add a space suit.

Take your time. On my hull I use their hard flat pad for one flat section section in the rear. The rest is done w/ their soft thick pad.

On my boat it takes a dozen discs to remove all the paint.

At that point I applied five coats of Interlux Interprotect 2000E epoxy barrier coat then bottom paint, all per the manufacturer's instructions.
And that tool alone cost about what I paid to soda blast my hull of my 30í boat, before account for any of your time.
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Old 05-24-2019, 08:35 AM
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Hello, the best product I have tried is Peel Away Antifoul remover, you do a test patch to work out how many hours to leave it, apply the stripper, plastic sheet over the top, most of the paint and stripper then sticks to the sheet, minimal mess. To get the like new finish will be very hard as when you first prep a hull for paint, you have to sand it for keying to the primer, so prepare for hours of wet sanding when all the paint is off. Hope this helps.
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Old 05-24-2019, 08:48 AM
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Originally Posted by 25WildBlue View Post
I’ve seen some hulls after soda blasting. Maybe it was done wrong I don’t know, but it def was not a smooth surface. It left it fairly course and kind of beat up looking. I don’t think there would be anyway to return it to clean gelcoat after that.

I use a da palm sanded with shop vac attached and 80 grit. Goes through it fast but it’s pretty brutal work
soda blasting does not hurt gel coat one bit. It's expensive stuff and there are other products that look like soda and are much cheaper and can leave a rough surface. Did mine last week with soda and the gel coat looks like new
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Old 05-24-2019, 08:54 AM
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Have you tried a pressure washer? I got about 95% of my bottom paint off with a pressure washer earlier this year. Zero dust but you do need eye protection.
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Old 05-24-2019, 10:02 AM
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Originally Posted by phigamfsu View Post
And that tool alone cost about what I paid to soda blast my hull of my 30í boat, before account for any of your time.
It is a high-quality tool that LOVES continuous usage that has served me without a hiccup for over a decade.

I've used this for many, many projects, not just boat bottom sanding.

Every Festool product I've used is an amazing product that I would not hesitate to recommend.
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Old 05-26-2019, 06:17 AM
  #26  
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With my $20 harbor freight self vacuuming DA and an apparently too small compressor this is all I got in 20 minutes. The black stuff comes off easy but the blue stuff does not want to come off. Going to try a pressure washer and maybe some CitriStrip but Tuesday I’m going to get a quote to have someone else do it.
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Old 05-26-2019, 07:32 AM
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That would be very quick work w/ the Festool vacuum sander.

Good luck w/ your project.
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Old 05-26-2019, 07:54 AM
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Originally Posted by Tinkerinmatt View Post
The black stuff comes off easy but the blue stuff does not want to come off. Going to try a pressure washer and maybe some CitriStrip but Tuesday Iím going to get a quote to have someone else do it.
Welcome to reality. Mind you, that you are working on the EASIEST part of the whole job. I did the whole transom, that was enough to realize I wasnít going to do the whole thing. Took the guy about a day to do my 30í boat, where it would have taken me multiple weekends and countless miserable hours.

There is a reason so many people that have done this say the best way to do this is with $100 bills and pay a soda blaster / farrow / some dustless medium.
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Last edited by phigamfsu; 05-26-2019 at 11:34 AM.
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Old 05-26-2019, 03:18 PM
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I have done 3 boats with the Peelaway mentioned above. It can get you back near to gelcoat with minimal work. Then you need to hit it with an orbital followed by a couple of wet sands down to 1200 grit or better and then a cut and polish. If you have time and dont want to spend a lot of cash it can be done. The Peelaway gets 99% of the antifoul off and most of the barrier coat as well.
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Old 05-26-2019, 04:35 PM
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Originally Posted by Tinkerinmatt View Post
Iím going to get a quote from a local place in Hampstead called Anchors Away boat yard but he mentioned water blasting, not soda. He wouldnít give me a quote or even a ballpark without seeing it so Iím going to drag it 350 miles this weekend to get that quote, and depending on my level of sticker shock Iíll decide if I try to take it off myself. Iím not willing to put a ton of money into this hull because combining that with the 25Ē shaft motor on a 20Ē transom that I hate, the cost of raising the transom and bottom paint removal could just afford me a 25Ē transom hull with no paint.
Originally Posted by Tinkerinmatt View Post
This is mainly why I want to do it. The motor I have went 52-54mph on a clean hull, and on my hull I can only get 48. We are going to take a stab at it.

Trayder, your boat came out AWESOME and thats what I "hope" to end up with. Hopefully since my boat is so much smaller, and with 2 people, we can knock it out in a few nights.
Iím thinking the 25Ē motor on a 20Ē transom has more to do with your speed loss than the bottom paint. I get you want the bottom paint off but given the shaft/transom difference, any speed gain will likely be negligible from paint removal alone. I donít profess to be an expert but from experience with my own boat, I picked up 4+ mph on top end by raising my motor up one hole. Do you have a clear pic of transom/bottom in relation motor position when trimmed down?
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Old 05-26-2019, 08:36 PM
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Orbital or palm sander??? Hahaha, those wont move anything. You need to use an angle grinder with a 40 or 60 grit sander attachment. You will destroy the neighborhood and your health in the process. I have done it three times over the last 30 years. I expect to die any day now ;-)
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Old 05-27-2019, 03:43 AM
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Originally Posted by ttwo View Post



Iím thinking the 25Ē motor on a 20Ē transom has more to do with your speed loss than the bottom paint. I get you want the bottom paint off but given the shaft/transom difference, any speed gain will likely be negligible from paint removal alone. I donít profess to be an expert but from experience with my own boat, I picked up 4+ mph on top end by raising my motor up one hole. Do you have a clear pic of transom/bottom in relation motor position when trimmed down?

Its got a 5Ē Bobs Extension Bracket holding the motor on, so the motor is lifted 5Ē and the cav plate is even with the bottom of the hull. I do think it could come up another 1 hole.
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Old 05-27-2019, 03:48 AM
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Here are the steps I did.

peel away
pressure wash
sand with low grit palm sander
sand with higher grit
buffing compound of about 1000
buffing compound 1500


Its easy to get the paint off itís that damn barrier coat thatís incredibly hard to get off. It must be sanded off. Talk about uncomfortable is a total bitch and a mess. When I purchased the boat the process was already started so I was basically committed to do something. Looking back I would have paid to soda blast it from someone that knows what they are doing.
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Old 05-27-2019, 04:09 AM
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I once made the mistake of trying to remove some bottom paint myself. I tried every product out there. What a mess! Yeah the sides come off relatively easy, so you think oh, this is not so bad... wrong!! Itís hard as hell!!!!
Eventually I found a company that blasted it off.
Best $600 I ever spent!
wish I had used them day one.
My gel was ok but not perfect so I did a little sanding and sprayed 2 coats of new gel. It came out great. Not 100% perfect but not bad.
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Old 05-27-2019, 04:21 AM
  #35  
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I just did my 22’ skiff with a 5” sander. Went down to the barrier coat and then sprayed 4 coats of Interlux VC Epoxy. Took ~8 hours to sand, a couple hours for prep, and the painting went quick. Oh, 2 hours to put it on stands by myself then an hour to get it off stands. I’m happy and on the fence if I’d do it again.
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Old 05-27-2019, 04:44 AM
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100 dollar bills was the only thing that made sense to me
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Old 05-27-2019, 02:46 PM
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24 hours later shes done
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Old 05-27-2019, 03:01 PM
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A scraper like shipyards use that is very stiff, blunt the end and dry scrape. Works great if paint is thick enough and hard.
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Old 05-27-2019, 03:42 PM
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Its funny this thread title is the classic case of "five words that should never go together"

P.S. I'm in the same boat, very old bottom paint on a trailer boat...... I want to remove it but it's a lot of work, LOL.
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Old 05-27-2019, 04:12 PM
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I am surprised no one mentioned easy off oven cleaner. Not easy but I found it worked better than other products. Spray it on and leave it on the paint for at least an hour and scrape the paint off. Do not let the oven cleaner dry up you need to keep it wet with oven cleaner. After I scraped the paint off I would use Spray 9 and scrub with a 3m pad.
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