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General Minitrail Talk
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Clone to Honda conversion
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<blockquote data-quote="69ST" data-source="post: 152905" data-attributes="member: 5"><p>For what you're doing, glass bead media is ideal. Walnut shells won't touch rust, since they're softer than iron oxide. Not sure about the oil residue that they may leave behind, probably not a biggie, just more solvent cleaning to remove it. Glass bead is just aggressive enough to remove paint and rust, without removing any significant amount of solid metal or profiling the surface. It's also virtually failsafe (or idiot-proof, if you prefer a harsher term :19<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> once you see clean, "white" metal, move on...perfectly prepared surface. But seriously, you'd have to hold the stream in one place for a <em>long</em> time to remove any significant amount of solid metal. You'd be bored to death before that could happen. Effective & safe, what's not to like?</p><p></p><p>As for grit size, 80 is good. I've used different sizes, up to about 120; that leaves a somewhat smoother surface...irrelevant for blasting a frameset. It's slower than the coarser grit. And, glass beads break (literally) when they strike a surface, so you're getting a mix of progressively finer abrasive anyway. Glass bead is generally good for three passes through the gun. After that, it's dust and the collector vacuum inhales it right out of the cabinet, suspended in the air stream.</p></blockquote><p></p>
[QUOTE="69ST, post: 152905, member: 5"] For what you're doing, glass bead media is ideal. Walnut shells won't touch rust, since they're softer than iron oxide. Not sure about the oil residue that they may leave behind, probably not a biggie, just more solvent cleaning to remove it. Glass bead is just aggressive enough to remove paint and rust, without removing any significant amount of solid metal or profiling the surface. It's also virtually failsafe (or idiot-proof, if you prefer a harsher term :19:) once you see clean, "white" metal, move on...perfectly prepared surface. But seriously, you'd have to hold the stream in one place for a [I]long[/I] time to remove any significant amount of solid metal. You'd be bored to death before that could happen. Effective & safe, what's not to like? As for grit size, 80 is good. I've used different sizes, up to about 120; that leaves a somewhat smoother surface...irrelevant for blasting a frameset. It's slower than the coarser grit. And, glass beads break (literally) when they strike a surface, so you're getting a mix of progressively finer abrasive anyway. Glass bead is generally good for three passes through the gun. After that, it's dust and the collector vacuum inhales it right out of the cabinet, suspended in the air stream. [/QUOTE]
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