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  #11  
Old 04-25-2012
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Re: Is this a Good Sander for Bottom stripping

The drywall sander, with the screen, and keeping it wet, cuts through bottom paint like no sandpaper I've ever used. No dust, excellent results, and a lot less work than an orbital sander. The big difference is the direction you sand. Instead of sanding longitudinal on the hull, you sand from the waterline toward the keel. It's a lot less strenuous and you're able to get into those tight curves where the keep meets the hull. Of course, some areas will obviously have to be done by hand because of tight access.

Good Luck,

Gary
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Old 04-25-2012
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Re: Is this a Good Sander for Bottom stripping

Quote:
Originally Posted by travlineasy View Post
The drywall sander, with the screen, and keeping it wet, cuts through bottom paint like no sandpaper I've ever used. No dust, excellent results, and a lot less work than an orbital sander. The big difference is the direction you sand. Instead of sanding longitudinal on the hull, you sand from the waterline toward the keel. It's a lot less strenuous and you're able to get into those tight curves where the keep meets the hull. Of course, some areas will obviously have to be done by hand because of tight access.

Good Luck, Gary
Can you supporters of the drywall sander provide some pictures or links to what you are using? I tried the one pictured below and it was less than useless - it merely wore the "tooth" off the sanding screen.
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Is this a Good Sander for Bottom stripping-004.jpg   Is this a Good Sander for Bottom stripping-003.jpg  
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Old 04-25-2012
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Re: Is this a Good Sander for Bottom stripping

The one I saw used at the marina had a swiveling head--not fixed like the one in the photos. And, the guys using it dipped the head in a bucket of warm water every few minutes, which kept the screen from clogging up. The guy with the boat next to mine used one screen for each side of the boat--total of 2 screens for a 30-T Catalina. Before he started the hull had several fairly large chunks missing in the paint. When he finished those areas were smooth as silk. I think he purchased his at Home Depot, but I'm not sure. I'll ask him when I see him this coming weekend.

Cheers,

Gary
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Old 04-26-2012
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Re: Is this a Good Sander for Bottom stripping

Boatpoker:

1. I know it is gonna be a crappy job but boat is in my yard and it is very expensive to have someone come do it. I knew what I was getting into prior to having it hauled to my house and maybe it will be a good learning experience. (I'm sure I will gladly pay someone next go round though!)

2. There are blisters. So maybe I don't need to completley sand out the barrier coat, but I would like to get rid of the blisters and start fresh.

3. It is 1974 27' Catalina
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Old 04-26-2012
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Re: Is this a Good Sander for Bottom stripping

Haaa...Are you completely unsure of what to use now? Are you glad you asked? :-)
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Old 04-26-2012
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Re: Is this a Good Sander for Bottom stripping

This would be the drywall sander Travlineasy er Gary is referring to I believe.
Molded Plastic Pole Sander
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Old 04-26-2012
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Re: Is this a Good Sander for Bottom stripping

Quote:
Originally Posted by mmazour View Post
This would be the drywall sander Travlineasy er Gary is referring to I believe.
Molded Plastic Pole Sander
Thanks for that. It looks the same as the one I used except for the swiveling head feature. I guess I should try screens from a different manufacturer since others seem to have had good results with it, even though I didn't. I also didn't know about the water dip aspect - that might make all the difference.
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Old 04-26-2012
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Re: Is this a Good Sander for Bottom stripping

I just sanded my C&C 30 a week ago. I've done it with an orbital, a belt, a disc, you name it, and I'll never do that again-- too much work and too much mess. This time I wet sanded with a swiveling drywall sander (as shown above) on a pole with 100 grit screen. I hosed the bottom down then sanded. Every couple square feet I stopped, hosed off the "mush" and the sander and restarted. It was the easiest sanding job I've ever done. The boat is painted with Micron Extra, a soft ablative and I've always disliked the fact that even with a sponge roller or roll + tip, you can't get a smooth finish. I sanded it to smooth off the "wrinkles" in the old paint and to remove some of the buildup. The result was great- as smooth a finish as VC17. There was no dust and I did the whole boat in about 5-6 hours.
I did have to replace the sander- my first one was plastic and the piece that swivels broke. The next one I bought was all metal and worked well. I used about 8-10 screens for the whole project.
Contrary to one of the posts above, I found it easier for the most part to sand lengthwise- just physically easier. In a few areas sanding vertically was better but mostly for-and-aft. You can tell when it's time to stop and rinse everything-- a layer of mush builds up.
I don't know how it would work on a hard paint, but on an ablative, it's great.
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Re: Is this a Good Sander for Bottom stripping

Depending on the state of the bottom, a two handed scraper may be needed first. Then I like the Ridgid (Home Depot about $130) 6" hook & loop 6 hole R.O. hooked up to a shop vac. Disks harder to get than 5", but much faster. Use 60 or 40 grit, depending. Amazone a good source.
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  #20  
Old 04-27-2012
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Re: Is this a Good Sander for Bottom stripping

The head I saw used was metal, but it looked almost identical to the one pictured above.

Cheers,

Gary
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