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How to remove Anodizing from faded parts.

#1 2008-01-26 2:27pm

BridgeCity
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How to remove Anodizing from faded parts.

MODS--This is one to add as a sticky.

How to remove Anodizing from faded parts.

Clarifying what you are working with-
There is candy/translucent paint like you'd see on a Team Mongoose.
There is translucent Powder coating.  When applied over a polished surface powder looks like candy paint.  When applied over brushed aluminum it looks JUST like anodizing.
True Anodized aluminum is done through an electro-chemical dye process, rumor has it that food coloring has been used before.


The following info is purely for responsible adults, always work with an adult before handling dangerous chemicals.
http://i137.photobucket.com/albums/q211/m5h5m/Anodize001.jpg

1- Proper safety.  Caustic Soda/Lye is wickedly dangerous. even the rubber gloves I used started to deteriorate within seconds of contact.
Proper ventilation, eye and skin protection. away from pets/children/etc.

---->>>>WHITE VINEGAR NEUTRALIZES THE REACTION, KEEP LOTS OF IT ON HAND AND QUICKLY ACCESSIBLE!!!!
http://i137.photobucket.com/albums/q211/m5h5m/Anodize002.jpg

2- Add adequate water to your disposable bucket. Add Lye to the water SLOWLY. NEVER add water to lye as it has potential to "explode" in your face.

3- slowly dip the grease free parts.
http://i137.photobucket.com/albums/q211/m5h5m/Anodize003.jpg

4-The red started disolving immediately.  The blue disolved to a point where the blue was a residue that simply wiped off.
  I dipped these parts about 15minutes but results will vary depending on mixture strength, anodizing quality, etc.  the brake lever needed another 5 minutes of dipping.
http://i137.photobucket.com/albums/q211/m5h5m/Anodize004.jpg

5-carefully move the parts to your Vinegar bath and let them sit long enough to neutralize any lye on them or in cracks and crevices of the parts.
http://i137.photobucket.com/albums/q211/m5h5m/Anodize007.jpg

6- wash off the parts under water with a disposable rag. 
NOTE: Plastic washers, and chrome pieces were completely untouched by the lye dip.
http://i137.photobucket.com/albums/q211/m5h5m/Anodize008.jpg

7- dump the lye solution in a safe location away from pets/children, etc.

8- dump the leftover VINEGAR into your empty bucket to help neutralize leftover mixture. Dispose of or put the bucket in a safe location away from children/pets.

I'm going to use this Metalcast paint to create a faux anodized appearance.
http://i137.photobucket.com/albums/q211/m5h5m/Anodize009.jpg

DOES ANYONE KNOW of a hard surface to apply over the paint?
If not, I'm going to dap eurethane floor covering on them.

 

#2 2008-01-27 9:14pm

crash-endo
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Re: How to remove Anodizing from faded parts.

pics of the paint when you are done, oven cleaner works magic too and it comes in a can and wont explode in your face.

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#3 2008-01-27 9:33pm

TrulyOdd
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Re: How to remove Anodizing from faded parts.

parts that size...this works GREAT!

use some EASY OFF oven cleaner and a ziplock baggie.   
put the parts in the bag, spray a generous amount in there and seal.  wait about 10 minuntes or so...rub the parts inside the bag to kinda get any stubborn parts clean.  you'll see thru the bag when all the annodize is off.  take the parts out and rinse off.  you'll be surprised how easy they clean up.   use some MOTHERS polish to get them shinny! 


note:  don't leave parts in the bags over nite....i learned the hard way cleaning some parts, i fell asleep and woke up in the morning to the parts looking like cement.


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#4 2008-01-27 9:48pm

acuzerfdw
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Re: How to remove Anodizing from faded parts.

Will the EASY OFF damage the chrome on the quick release parts of the brake levers???


I DON'T HAVE ANYMORE BIKES OR PARTS... ALL MY PICS ARE OUTDATED


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#5 2008-01-27 9:51pm

FRESSTYLE FREEK
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Re: How to remove Anodizing from faded parts.

+ 3 on oven cleaner it works most of the time!!


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#6 2008-01-28 4:39am

BridgeCity
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Re: How to remove Anodizing from faded parts.

the active ingredient in the oven cleaner is caustic soda, just in a smaller concentration.

Tested the paint on the clamp and neck lock.  it's a VERY thin laquer candy paint.
was able to coat the clamp in the recommended 3 coats.
the lock was a problem. the paint kept pulling to the crevices and draining off the flat surfaces.
I'll have to redo that piece in about 6 very light coats to get it to run properly.

Ends up looking like candy paint, not anodizing. but it's still going to be better than faded.  Texture reminds me of the colors you'd see on bikes around 79-80 like the gold on Rampars.

Last edited by BridgeCity (2008-01-28 6:21am)

 

#7 2008-01-28 9:45pm

prolineII
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Re: How to remove Anodizing from faded parts.

cool post bridgecity.
i use caustic soda to remove the anno and then glass paint.

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#8 2008-01-29 6:15am

BridgeCity
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Re: How to remove Anodizing from faded parts.

Cool.  Can you elaborate on what glass paint is?
Is it durable requiring no finish coat?
thank you.

 

#9 2008-01-29 1:57pm

prolineII
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Re: How to remove Anodizing from faded parts.

BridgeCity wrote:

Cool.  Can you elaborate on what glass paint is?
Is it durable requiring no finish coat?
thank you.

the glass paint i use is a translucent paint used to paint glass for a fake stained look. the particular brand i use is available in basic colours such as red, blue and yellow. i painted some head set cups that turned out like a candy red and then some DX cranks that turned out ok but there were too many flaws in the casting (needed more polishing) to get a show look.
it is quite durable and probably on par with the paint used on DX pedals.
i'll get some pics later.

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#10 2008-02-05 1:03pm

Slicer GBA
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Re: How to remove Anodizing from faded parts.

ProlineII .. what is the brand of paint? Is it something you can get at a hardware store or art supply store?


Dyno UL plate, Dyno Brake Guard - D1, D2, or UL

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#11 2008-02-05 1:05pm

Slicer GBA
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Re: How to remove Anodizing from faded parts.

And make sure you get the old school Easy Off,  they have a new "safer" version that does not have the caustic.  Don't make the mistake I did and sit and wait while nothing happens to your part. smile


Dyno UL plate, Dyno Brake Guard - D1, D2, or UL

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#12 2008-02-06 6:29am

Hoagie
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Re: How to remove Anodizing from faded parts.

On these ACS hubs I used Dupli_Colour  MetalCast  Yellow anodized Paint ...First I removed the original paint then gave them a work over with Mothers polish...Using a blow torch I heated the hubs just prior to painting (in the oven would work) that way the paint dried fast enough not to run...the front hub came out better than rear... I gave it 3 quick lite coats before it cooled down.

I took a guess on how hot ...just hot as to still touch them.

Try on a small part first ....

http://i166.photobucket.com/albums/u96/Hoagie_Bmxer/IMG_1079.jpg

http://i166.photobucket.com/albums/u96/Hoagie_Bmxer/IMG_1080.jpg

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#13 2008-02-08 2:57pm

prolineII
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Re: How to remove Anodizing from faded parts.

Slicer GBA wrote:

ProlineII .. what is the brand of paint? Is it something you can get at a hardware store or art supply store?

the paint is available from the local hardware shop.

http://i37.photobucket.com/albums/e86/nak302/2008_0208007.jpg

this is the finish on a chrome headset cup. i've put it next to a NOS pedal to compare the colour.

http://i37.photobucket.com/albums/e86/nak302/2008_0208001.jpg

here's a pic of a bike with the painted headset

http://i37.photobucket.com/albums/e86/nak302/2007_0624002.jpg

this is what i use for de-annodizinging and is available from hardware shops as well

http://i37.photobucket.com/albums/e86/nak302/2008_0208003.jpg

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#14 2008-02-09 12:52pm

BridgeCity
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Re: How to remove Anodizing from faded parts.

the glass paint looks really nice. can you vary the darkness by adjusting the thickness of the paint application?

I just checked on the items I painted a week or so ago. the color is right between the translucent red powder on the goose and the OG red ano on race inc. bars.  it is darker than the NOS red ano on a dia compe brake lever which really seems like a light candy red.  the paint seems fairly hard so I'm going to go without a protective coat.

the metal cast seems to go on best if you steel wool the parts, wash them in dishsoap, really slop them down with the prep spray, then 1 super light coat of paint, wait about 10 minutes and do the next coat, wait just a minute then do a light finish coat to even everything out.  otherwise runs and darkness occur.

-->I've got a mismatched set of chinese brake calipers if someone wants them for the cost of shipping to experiment.  the left is the mx1000 look alike stamped 1000a. the right is the older roundish style stamped 890.  currently they are that weird orange-gold chinese ano color. yuck.

 

#15 2008-02-19 6:37pm

BridgeCity
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Re: How to remove Anodizing from faded parts.

Here is the metalcast red.
for comparison, the race inc. bars and 2 finger lever are survivor red. other parts are freshly painted.

http://bmxmuseum.com/image/metalcastred_lg.jpg

 

#16 2008-02-20 5:34am

kendal
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Re: How to remove Anodizing from faded parts.

Did you guys pre-heat before painting with the glass paint?  Also, on the caustic soda is this something Home Depot or Lows may have?

Thanks


Wish I still had my 81 Motomag Goose!

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#17 2008-02-20 6:16am

BridgeCity
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Re: How to remove Anodizing from faded parts.

yes, the lye came from Menard's.

 

#18 2008-02-20 6:41am

kendal
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Re: How to remove Anodizing from faded parts.

BridgeCity wrote:

yes, the lye came from Menard's.

I do some refinishing on firearm parts and I have to say that you did one nice job on your parts.  Congrats!


Wish I still had my 81 Motomag Goose!

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#19 2008-02-20 6:49am

BridgeCity
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Re: How to remove Anodizing from faded parts.

thank you, it took some tries to figure out the proper thickness and time between coats to match the depth of the survivor parts.

 

#20 2008-02-20 7:29am

kendal
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Re: How to remove Anodizing from faded parts.

When I do some refinishing I have had good success with airbrush setups.  They make it easy to control the thickness of the coat you are laying down. 

Do you feel that the adhesion promoter was a necessary step.  Was it a clear coating?

When I paint alum. I have to use a primer that acts like an etching layer to make the coating stick. But it adds some minor thickness.

Thanks


Wish I still had my 81 Motomag Goose!

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#21 2008-02-20 8:01am

BridgeCity
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Re: How to remove Anodizing from faded parts.

i have little air brush technique...then the dang thing got stolen out of the garage. doh.

the promoter was very helpful, it evaporated quickly and left a whitish tint to the finish almost like MEK would. Methyl Ethyl Keytone.  there was no thickness to this, just evaporation.

the paint really sticks tight and it's hard to dig into. you can get it to chip if you really dig at a corner.

once again, i did the metalcast spray, not the glass paint mentioned above.

 

#22 2008-02-20 8:52am

kendal
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Re: How to remove Anodizing from faded parts.

I agree metalcast is the way to go.


Wish I still had my 81 Motomag Goose!

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#23 2008-02-23 1:59pm

BridgeCity
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Re: How to remove Anodizing from faded parts.

Got the colored parts slapped on the bike today. Matches as good as can be expected from spraypaint with the survivor Araya's, I think.

http://i137.photobucket.com/albums/q211/m5h5m/r11xlOutside.jpg

Last edited by BridgeCity (2008-03-06 6:27am)

 

#24 2008-03-04 3:29pm

WheelyBoy
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Re: How to remove Anodizing from faded parts.

Thinking about trying this caustic soda stripping method on some annodized rims. I'm curious what the ratio of soda to water is? How much soda do you add per gallon of water? Would Easy Off be a better way to go? I have a large plastic tub that's big enough to lay a rim flat on the bottom?

Mike

Last edited by WheelyBoi (2008-03-04 3:31pm)


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#25 2008-03-04 6:23pm

kendal
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Re: How to remove Anodizing from faded parts.

Man, generic oven cleaner (yellow can)from Walmart was the easy way to go.  As stated above just don't leave for long period 7-10 min. works for me.


Wish I still had my 81 Motomag Goose!

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