Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

worn carbon crank clearcoat

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

worn carbon crank clearcoat

Reply

Old 05-10-12, 05:57 PM
  #1  
Bctrider
newMember
Thread Starter
 
Join Date: Apr 2010
Location: Vancouver, BC
Posts: 77

Bikes: 2010 Kona Jake The Snake, 2010 Everti Falcon, 2008 Norco CRD 1, 1984 Bianchi Tipo Corsa,

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
worn carbon crank clearcoat

Hello

Please see the following:



the clearcoat on the carbon is worn from missed clip-ins.

Are there any 'safe' products that I could use to replace the worn down clearcoat to protect the carbon?

Thanks for any suggestions.

Brian
Attached Images
File Type: jpg
P5100007 (640x480).jpg (57.9 KB, 59 views)
Bctrider is offline  
Reply With Quote
Old 05-10-12, 06:01 PM
  #2  
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 31,102

Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
Quoted: 1002 Post(s)
Clear nail polish should work.
HillRider is offline  
Reply With Quote
Old 05-10-12, 07:10 PM
  #3  
clydeosaur
Senior Member
 
clydeosaur's Avatar
 
Join Date: Aug 2009
Location: Central PA
Posts: 627

Bikes: Cannondale Six5, Specialized Stumpjumper FSR & old Hard Rock

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
clear 5 minute epoxy
clydeosaur is offline  
Reply With Quote
Old 05-11-12, 12:26 AM
  #4  
commo_soulja
Senior Member
 
commo_soulja's Avatar
 
Join Date: Aug 2008
Location: C-Ville
Posts: 1,144

Bikes: are fun to ride

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Don't fuss with epoxy or nail polish, get these, http://www.universalcycles.com/shopp...s.php?id=38713
commo_soulja is offline  
Reply With Quote
Old 05-11-12, 01:54 AM
  #5  
Kimmo
bike whisperer
 
Kimmo's Avatar
 
Join Date: Dec 2009
Location: Melbourne, Oz
Posts: 7,713

Bikes: https://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=152015&p=1404231

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 264 Post(s)
Pretty sure it's almost entirely cosmetic; my feeling is the carbon is a hell of a lot tougher than the clearcoat.

The most clearcoat does to protect carbon is block UV, AFAIK.
Kimmo is offline  
Reply With Quote
Old 05-11-12, 02:04 AM
  #6  
hueyhoolihan
Senior Member
 
Join Date: Dec 2010
Location: Above ground, Walnut Creek, Ca
Posts: 6,689

Bikes: 8 ss bikes, 1 5-speed touring bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 86 Post(s)
i thought it was obvious that this stuff is an inappropriate material for abrasive applications. frames? okay, not dropouts and not cranks, maybe seatposts in carbon seattubes. at least not if the owner has an expectation that they will stand up to daily use for more than a few years...
hueyhoolihan is offline  
Reply With Quote
Old 05-11-12, 06:06 AM
  #7  
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 31,102

Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
Quoted: 1002 Post(s)
In general I agree with you that carbon has been used where it really isn't needed or even appropriate. Carbon seatposts in particular seem to cause far more problem than any possible benefit.

As to carbon fork dropouts, I'm not crazy about the idea but my experience with two Easton EC90SLX forks on two bikes with 23,000 and 19,000 miles respectively tells me that aren't the problem you might expect. Neither fork shows any wear or damage to the dropouts despite many front wheel removals and relacement. I wouldn't pick them given the choice but they do seem to be satisfactory.
HillRider is offline  
Reply With Quote
Old 05-11-12, 01:31 PM
  #8  
ibis_ti
Senior Member
 
Join Date: Jul 2009
Location: Norcal
Posts: 201
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Or use a bit of sugru or plastidip.

Originally Posted by commo_soulja View Post
Don't fuss with epoxy or nail polish, get these, http://www.universalcycles.com/shopp...s.php?id=38713
ibis_ti is offline  
Reply With Quote
Old 05-11-12, 03:01 PM
  #9  
DannoXYZ 
Senior Member
 
DannoXYZ's Avatar
 
Join Date: Jul 2005
Location: Saratoga, CA
Posts: 11,739
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 101 Post(s)
Originally Posted by Kimmo View Post
Pretty sure it's almost entirely cosmetic; my feeling is the carbon is a hell of a lot tougher than the clearcoat.

The most clearcoat does to protect carbon is block UV, AFAIK.
Yeah, that's actually just the cosmetic paint layer that's removed. Between the actual carbon and paint is a gel-coat. Extremely tough and durable epoxy, it's not compromized in any way. Just use nail-polish or some other clearcoat type paint to fill in the dings.
DannoXYZ is offline  
Reply With Quote
Old 05-14-12, 05:48 AM
  #10  
Bctrider
newMember
Thread Starter
 
Join Date: Apr 2010
Location: Vancouver, BC
Posts: 77

Bikes: 2010 Kona Jake The Snake, 2010 Everti Falcon, 2008 Norco CRD 1, 1984 Bianchi Tipo Corsa,

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks folks. I'll try the nail polish. My concern was some sort of reaction between the substances. I figure that carbon is chemically inert, just wasn't sure about the epoxy its impregnated with.
Bctrider is offline  
Reply With Quote
Old 05-14-12, 09:23 AM
  #11  
ultraman6970
Senior Member
 
Join Date: Dec 2005
Posts: 7,859
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The problem with that crankset is not that the clear is worn, the problem is that the crankset has nicks!... two different problems.

How to fix it? I wouldn't use nail polisher because it will crack maybe after a week, specially if you managed to nick the cranks, then it will happen again.

What you have to do is to use polyurethane car clearcoat, is the only thing that will stay there maybe forever, in a matter of fact that's the clear that is in the crankset right now. Dont use polyurethane clear coat from home depot, that will get yellow because is designed for indoor use, has to be car grade polyurethane clear coat.

Good luck.
ultraman6970 is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service