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Jon and V Boat Conversions & Modifications
Aluminum boat paint prep
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<blockquote data-quote="Ray Clark" data-source="post: 495184" data-attributes="member: 31103"><p>I'm with thill on this. I've joked before that 40 grit is just gravel glued to sandpaper.</p><p></p><p>An angle grinder would be a no-go. I also think 40 grit in a random orbit sander would still be too aggressive; one slip can go through aluminum pretty quick. A palm sander (aka 1/4 sheet sander) would be safer, but very slow.</p><p></p><p>40 grit will also leave a pretty significant scratch pattern; if you're looking for a really smooth finish, you'll spend a lot time with varying grits to smooth it out.</p><p></p><p>Another abrasive alternative might be a polycarbide abrasive wheel. These do go in angle grinders; I used one to strip paint from my boat when I first bought it three years ago. It worked well; available at <a href="https://www.harborfreight.com/4-1-2-half-inch-nylon-abrasive-wheel-94017.html?_br_psugg_q=polycarbide+abrasive+wheel" target="_blank">Harbor Freight</a>. I've never tried to remove bed liner with it, so I don't know how that would go. If the bed liner is in an area that would otherwise be covered up, I think I'd just topcoat paint it and let it go.</p></blockquote><p></p>
[QUOTE="Ray Clark, post: 495184, member: 31103"] I'm with thill on this. I've joked before that 40 grit is just gravel glued to sandpaper. An angle grinder would be a no-go. I also think 40 grit in a random orbit sander would still be too aggressive; one slip can go through aluminum pretty quick. A palm sander (aka 1/4 sheet sander) would be safer, but very slow. 40 grit will also leave a pretty significant scratch pattern; if you're looking for a really smooth finish, you'll spend a lot time with varying grits to smooth it out. Another abrasive alternative might be a polycarbide abrasive wheel. These do go in angle grinders; I used one to strip paint from my boat when I first bought it three years ago. It worked well; available at [URL='https://www.harborfreight.com/4-1-2-half-inch-nylon-abrasive-wheel-94017.html?_br_psugg_q=polycarbide+abrasive+wheel']Harbor Freight[/URL]. I've never tried to remove bed liner with it, so I don't know how that would go. If the bed liner is in an area that would otherwise be covered up, I think I'd just topcoat paint it and let it go. [/QUOTE]
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