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Polishing Aluminium...

Old 03-03-05, 02:10 PM
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brooklyn
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Polishing Aluminium...

I have a bare aluminium frame that i polish about once a year. I was wondering if it was possible to grind down the welds to get seamless looking frame. I thought of this when I was looking at some cannondales.
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Old 03-03-05, 02:26 PM
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Most likely weaken the welds by doing that, but hey, it's your butt on the side of the road.
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Old 03-03-05, 03:13 PM
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Lugged steel has no welds...
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Old 03-03-05, 03:24 PM
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You would be better served building them up then grinding them down. I really think you should just leave it.
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Old 03-03-05, 03:32 PM
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Cannondale does dress their welds. Does anyone know if they actually grind them down, or do they smooth them with glazing putty before painting?

They do have a slight reputation for frame failure on this forum.
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Old 03-03-05, 03:33 PM
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I grind steel quite a bit, but I'd be afraid to mess with AL welds. Plus, and I could be wrong, I think my Cannondales are just welded really well(clean), not ground after the process. I've seen, and made, some really ugly, but serviceable, MIG welds before. No experience with AL, though(or TIG for that matter). Just polish it and be glad it's still together.
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Old 03-03-05, 03:45 PM
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Originally Posted by Avalanche325
Cannondale does dress their welds. Does anyone know if they actually grind them down, or do they smooth them with glazing putty before painting?
Couldn't find it on their site, but I was hoping you knew when I saw that you had posted. LOL



Originally Posted by Avalanche325
They do have a slight reputation for frame failure on this forum.
I'm still working on that, but maybe another 10 years will do it. Why won't it die?!
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Old 03-03-05, 05:43 PM
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I think that I have been to many watching to much tv OCC, Monster Garage, etc
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Old 03-03-05, 06:01 PM
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Putty the welds at the head tube junction and then get a custom flame job. I have two bare aluminum frames, and one bare titanium frame. I don't bother polishing any of them. The tandem is Ti, and it would take forever to polish.
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Old 03-03-05, 06:12 PM
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Originally Posted by Karldar
I grind steel quite a bit, but I'd be afraid to mess with AL welds. Plus, and I could be wrong, I think my Cannondales are just welded really well(clean), not ground after the process. I've seen, and made, some really ugly, but serviceable, MIG welds before. No experience with AL, though(or TIG for that matter). Just polish it and be glad it's still together.
They are definately dressed. Raw welds just don't look like that, no matter how good they are. It looks like they are probably filled (extra beads run) and ground down. One of the pictures looks like the frame in annodized, and you can't annodize bondo.

Wow, we are off subject. The answer is.....No, do not grind your welds. You could easily weaken the joints. It would not be good to have your head tube snap off because you tried to make it look pretty.
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Old 03-03-05, 06:30 PM
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If your welds look like this, you don't have to do anything to them.
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Old 03-03-05, 06:53 PM
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Originally Posted by Expatriate
If your welds look like this, you don't have to do anything to them.
Those are very pretty welds. Why would anyone want to hide that craftsmanship?
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Old 03-03-05, 07:14 PM
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That's on my Ti tandem. It was polished when I got it, but that's just too much work to maintain. The welds are really clean looking throughout.
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