Slowtwitch.com Main Index MAIN
INDEX 		Forum Rules & Legend RULES &
LEGEND 		Log in LOG
IN 		 
 
 
Search for (options)
Newsletter Signup

Slowtwitch Forums: Triathlon Forum:
painting crankarms?

 
  Tri ForumClassifiedsLavender RoomJobsThe Womens


yoondaddy

Jul 3, 09 21:34

Post #1 of 5 (145 views)
painting crankarms? Can't Post
I'm trying to go for a red and black scheme on my roadie and the last major coloring I need to do is the crankarms. I want them to be black. I'm thinking about sanding down my 105 arms and painting them black and then a clear coat. I've heard that the aluminum alloy on the shimano parts are hard to get a good coat of paint to stay on. Has anyone tried this and been successful?


i do all 3

Jul 3, 09 22:23

Post #2 of 5 (134 views)
Re: painting crankarms? [yoondaddy] [In reply to] Can't Post
 

Check this out:

http://nalgenestore.com/2009crankskins.html

------------------------------------------------------------
"PAIN is nothing compared to what it feels like to QUIT" Wink


bmanners

Jul 4, 09 3:19

Post #3 of 5 (99 views)
Re: painting crankarms? [yoondaddy] [In reply to] Can't Post
Think the aluminum would have to be acid treated somehow to get any good grip with the paint that would last.


:D

Jul 4, 09 6:02

Post #4 of 5 (65 views)
Re: painting crankarms? [yoondaddy] [In reply to] Can't Post
skins.

Sponsors: Quarq, Steady State Sports, Hincapie Sportswear.



Maniacal

Jul 4, 09 6:02

Post #5 of 5 (65 views)
Re: painting crankarms? [yoondaddy] [In reply to] Can't Post
YES.

The problem with conventional wet paint is that you would need to have a 2 component paint that cross links to make sure it adheres properly and offers proper mar resistance. I just repainted my entire bike including the crank arms using powder coating and it turned out to be spectacular.

To get a good key you could acid etch BUT that could also go horribly wrong. I would do the following:

  1. Lightly sand with a 150-200 grit sandpaper to get a good key
  2. Wash the parts with alcohol or paint thinners to degrease [wrap up in a clean towel and handle with rubber gloves after]
  3. Then powder coat with a polyester powder coating.
No clear coat required if you are using powder and this is one of the most durable coatings you can get. Remember to plug all your threaded sections and areas where you don't want paint.

Hope this helps
Cheers...

Rich