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your way to polish pitted aluminum?

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your way to polish pitted aluminum?

Old 05-05-11, 04:14 PM
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your way to polish pitted aluminum?

how do you polish or restore pitted or corroded vintage aluminum components, such as brake calipers, stem, etc.?
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Old 05-05-11, 04:29 PM
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https://www.vintagebmx.com/community/...wtopic=4005471

Some emery cloth and toothpaste can also work if it's not too far gone.
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Old 05-05-11, 05:05 PM
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There are a number of commercial polishes for aluminum which use a mix of abrasives and chemical brighteners. If the pitting isn't too deep they do a fine job. For deeper pits, my favorite is Scotchbrite (or less costly analog) pads. I prefer pads to emery cloth because of their ability to conform to the curves on bile parts, and leave the emery paper or cloth for bigger more open areas.
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Old 05-05-11, 05:26 PM
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I blast with walnut shell if they are not too bad, if needed I will sand blast, then
sand paper, steel wool and Never Dull.

These I didn't want a mirror finish on so after blasting I just scotch bite padded them.
They were white crusted to start with.



A wipe with Never Dull keeps them nice for some time..

For those that don't know about Never Dull:

https://www.nevrdull.com/
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Old 05-05-11, 05:42 PM
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to polish out pits the surface has to be taken down considerably,
but in general Simichrome is one of those mild abrasive metal polishes .

there are carborundum impregnated scouring pads,
like scotchbrite but brown and much more abrasive..
I use them to get the scorched stuff off my stainless pans
hardware store stuff..

Last edited by fietsbob; 05-05-11 at 05:58 PM.
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Old 05-05-11, 05:46 PM
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Having no sandblaster or dremel tool to make it easy, I'm thinking Scotch pad with a non-bleach polishing powder, and finish with NEVR DULL. More suggestions welcome.
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Old 05-05-11, 05:46 PM
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I said emery cloth but I meant scotchbrite
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Old 05-05-11, 06:00 PM
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Depends on how deep the pitting is, if it's too deep, you shouldn't bother polishing the part as you will have to take off so much material to make the pitting go away. If it's just light pitting, a buffer wheel and some polishing compounds of differing grits will be your friend. Get ready for the black Al polishing residue mess!

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Old 05-05-11, 07:04 PM
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I've disassembled rims, sanded with 600 to 1200, used 0000 brass/bronze wool, then used mothers and they came out really nice.

The right one is after, obviously.
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Old 05-06-11, 10:34 AM
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[QUOTE=Aquakitty;12601557]https://www.vintagebmx.com/community/...wtopic=4005471

This is a throurgh treatment on polishing. I used it to polish up some 30 year old cranks to a mirror finish. sorry no pics I am at work. The basic method is start with coarse and move to fine (as Scottnobombs does), I finish with a metal polish.

1. Strip off clear coat if applicable
2. Wet sand with 800 sand paper (From auto parts store)
3. Wet sand with 2000 sand paper (From auto parts store)
4. Polsih with metal polish (Brasso)
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