Good method for removing old bottom paint - SailNet Community

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Old 03-01-2012
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Good method for removing old bottom paint

How effective have people found those mesh paint removing disks to be in removing old layers of ablative bottom paint? I've found that hitting the bottom with a coarse disk works but tends to burnish the metal in the paint, making it more difficult. What do people feel about those blue mesh disks?
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Old 03-01-2012
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clarification

I'm talking about the kind of mesh disk that is used on a power tool. It can be anywhere from 4.5" to 7" in diameter.
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Old 03-01-2012
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Quote:
Originally Posted by Gladrags1 View Post
I'm talking about the kind of mesh disk that is used on a power tool. It can be anywhere from 4.5" to 7" in diameter.
If by "mesh" you're talking about the disks for angle grinders that look almost like a resinated pot scrubber material, they are fabulous - at stripping paint from aluminium spars, car bodies etc. They remove the finish but don't abrade the substrate - they leave a sort of burnished surface on metal, not a "sanded" surface. They are the first thing I reach for in those cases, even though they can get a bit expensive - they don't last all that long.

Having said that, I have no experience using them on bottom paint. I'd certainly invest in one to see how they worked on that surface. They aren't real aggressive so I wouldn't worry about the gel coat getting damaged by a little carelessness, even though you will be using a grinder to spin them.

If you decide to use them, I'd find a supplier who sells them in bulk - boxes of 10 or 12 if not larger. As I said earlier - using them can get pricy at $7 or $8 each.
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Old 03-01-2012
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Ablative bottom paint comes off very easily when wet and abraded with sanding mesh on a plasterboard sanding tool - an 8x4 plate attached to a "broom handle" by a universal joint. It takes no more elbow grease than holding up a power tool for hours on end and you don't have to inhale the dust!
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Old 03-01-2012
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Just answered a a question I was going to ask.
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Old 03-02-2012
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Sounds great! Thanks. I need to locate a cheap source for replacement disks then.
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Old 03-02-2012
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Quote:
Originally Posted by Gladrags1 View Post
How effective have people found those mesh paint removing disks to be in removing old layers of ablative bottom paint?... What do people feel about those blue mesh disks?
Very effective. They are also very effective at inadvertently removing the gelcoat.
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Old 03-02-2012
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Its less than 30 foot water line , just wet sand with 80 grit, nd you dont breath the dust.
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No, I'm talking about one of these mesh disks.
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Last edited by Gladrags1; 03-02-2012 at 11:23 AM. Reason: Correct hyperlink
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Old 03-02-2012
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Scrape it as if you sand it all you will absolutely positively GO to deep here and there and have a golf ball bottom





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If a dirty bottom slows you down what do you think it does to your boat
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