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Maintenance & Workshop Talk The central area for general maintenance, trouble-shooting and modifications ------------ (Other technical forums on the site are model specific)

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Old 05-27-2010, 10:25 AM   #1 (permalink)
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Dremel... Rust Removal n Polishing?

Can anyone reccommend the correct grade of abrasive to perform minor paint/rust/corrosion removal and polishing using a Dremel, on a mix of both steel and aluminium components?

There's a pic of a set of fork legs in this month's Practical Sportsbikes that look totally rejuvinated and the author referrs to the use of an air driven tool with flap disk and Dremel, but what grade(s) and how?

Every time I take my Dremel to a component it looks like it's eating the finish and butchering the workpiece... is it me, or am I totally missing the point?



Thanks in advance...
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Old 05-27-2010, 06:50 PM   #2 (permalink)
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Every time I take my Dremel to a component it looks like it's eating the finish and butchering the workpiece... is it me
Fierce little b**ggers are`nt they reckon it could be down to just trying different grades out??
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Old 05-29-2010, 11:35 AM   #3 (permalink)
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It's easy to bugger up a piece with a Dremel if you're not careful. Dremels spin very fast and focus all that "work" on a very small area. Spread all that small work over a large area and you will see uneven results. Steel is harder than aluminum, so your technique will have to adapt to each substrate as well. In the article the flap disk was most likely used on the larger surface areas and the Dremel around small nooks & crannies.

I've found that using a small or spot media blaster works well to remove rust and, depending on the media used, generally doesn't do much harm. It would also leave a pretty fairly even surface that would allow you to hand sand and polish with decent results.

What parts are you actually working on? The fork parts?
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Old 05-29-2010, 12:00 PM   #4 (permalink)
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Use a BUFFING wheel on the Dremel along with Autosol or some other polishing creme. The Dremel is excellent because of its size to work into places other tools can not get in. Great tool! Good Luck!
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Old 05-29-2010, 04:57 PM   #5 (permalink)
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A Dremel is a toy.

A cheap air driven die grinder is much better. You can have infinite finger tip speed control and it will chuck up "real" refinishing accessories.

http://www.google.com/products/catal...d=0CD0Q8wIwAg#
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Old 05-29-2010, 05:28 PM   #6 (permalink)
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Oldndumb; If you read the question, Addict is asking about the use of the Dremel tool, you will see that your caustic remarks are unwarranted and are void of value!
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Old 05-29-2010, 06:51 PM   #7 (permalink)
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I'm using my Dremel to take the acres of rust off of my old Ducati. It works really well but you have to be patient and have a lot of spare bits because they wear-down rather quickly.
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Old 05-29-2010, 07:32 PM   #8 (permalink)
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Oldndumb; If you read the question, Addict is asking about the use of the Dremel tool, you will see that your caustic remarks are unwarranted and are void of value!
widowman, Obviously anyone can read and understand what he asked.

But where is it written, other than in your own rules, that an answer/reply cannot be expanded upon?

Other than in your own rules, where is it written that a better option or procedure cannot be mentioned.

Where is it written, other than in widowman's rules, that it is proper and acceptable to accuse someone else of being "caustic" and that their remarks are of no value?

widow man, when you suggest a procedure in this forum, do not be offended because it is a common occurrence. I guess, you could avoid that by having your own forum, but until then, you need to understand that it may happen again.

And getting back to the subject, for the price of a Dremel you can buy a die grinder with much more capability. Just a suggestion for those open to suggestions.
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Old 05-29-2010, 07:48 PM   #9 (permalink)
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Both tools are excellent. I agree with the dumb guy in that an air die grinder is superior; however, not all of us have a compressor to power one.

Has anyone checked out the definition of "caustic" as an adjective? I did and found that one of you is much more caustic than the other.

Perhaps we should have a poll?
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Old 05-29-2010, 08:00 PM   #10 (permalink)
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piney'shop, ye be funny.

As for costs, if someone contemplates the initial purchase price of a Dremel set, and the continual replacement cost of the toy accessories, I think that a cheap die grinder and one of those small oil less compressors would be more economical. Another consideration is that a Dremel has a very limited life. It has a minimal bearing, if you can call it that, in the nose piece and the armature rear bearing is a dry bushing.

I have two die grinders that I have used for over twenty years with no failures. I thought a Dremel would be a convenient alternative and tried one. It failed to operate after less than one hour. It was replaced on warranty. The next one lasted for about four uses. I gave up on them then. I did disassemble the second one and was very unimpressed with the component quality. You would think I had learned my lesson, but no, later I bought another one. That one was meant for limited use as a light duty post grinder on my lathe. After two uses, it developed excessive run out. I hope I never have another Dremel relapse.

BTW, there is a hand held grinder similar to a Dremel that is marketed to the machinist trade but it is $$$ which, by comparison, is relevant to Dremel quality. Sears has one, but it is fairly large in comparison, but seems to be a reliable unit.

Warning....caustic words to follow. A Dremel belongs in a craft shop, or a Builder Bob tool box.
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