Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

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.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 10-17-09, 08:27 AM   #1
the_don
Senior Member
Thread Starter
 
the_don's Avatar
 
Join Date: May 2008
Location: Tokyo
Bikes:
Posts: 1,917
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Prep work for painting?

I am thinking about buying this Nagasawa frame (I live in Tokyo and saw this on Yahoo auctions Japan).

It is a bit battered and looks like it needs a paint job, the seller says there is just one dent in the head tube from the handlebars hitting it, so I would probably just put a small Kashimax TT protecter to hide it. (Is it possible to remove dents in the tubes?)

Anyway, a friend of mine loves cars and has a complete painting setup in his garage and offered to paint it if I bought it. I found a nice looking Nagasawa decal kit on ebay too!!

What is the best way to prep the frame for painting?

Thanks.





the_don is offline   Reply With Quote
Old 10-17-09, 08:35 AM   #2
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Bikes: Rans Rockst (Retro rocket) Rans Enduro Sport (Retro racket) Catrike 559, Merin Bear Valley (beater bike).
Posts: 26,742
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 143 Post(s)
I'm a believer in stripping the old paint down to the metal and starting over with new primer. If I were going to have a friend paint it, I'd ask him what kind of prep he recommends.
Retro Grouch is offline   Reply With Quote
Old 10-17-09, 09:42 AM   #3
Grand Bois
Senior Member
 
Grand Bois's Avatar
 
Join Date: Mar 2005
Location: Pinole, CA, USA
Bikes:
Posts: 16,693
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 90 Post(s)
Prepping a bike frame for paint is the same as prepping car parts for paint. Ask your friend.
Grand Bois is offline   Reply With Quote
Old 10-17-09, 10:42 AM   #4
ottothecow
Senior Member
 
Join Date: Sep 2009
Bikes:
Posts: 283
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
aircraft remover seemed to work pretty well on some parts of my bike...other areas the paint was pretty not responsive.

I had good luck cutting up pop cans to make little scrapers that I could toss once they lost their edge...plastic scrapers were not strong enough.

I then hit everything with a wire wheel on a drill...was able to get at all the corners and the wire brush will clear up any rust. For the dent, fill it with some sort of body filler before painting and you won't even have to cover it up.
ottothecow is offline   Reply With Quote
Old 10-17-09, 12:25 PM   #5
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Bikes: Several, mostly not name brands.
Posts: 16,529
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 126 Post(s)
Yes, it is possible to fix dents in frame tubes. If it's just a small dent, fill it with lead solder and file it smooth to match the rest of the tube. After you repaint you'll never known it's there, and since it's filled with metal it won't come out (unlike body putty).
JohnDThompson is offline   Reply With Quote
Old 10-17-09, 12:41 PM   #6
San Rensho 
Senior Member
 
Join Date: Oct 2005
Bikes:
Posts: 5,548
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Bead blasting followed by phosphoric acid etch is the only way to go if you really want a rust free frame forever.
__________________
Il faut de l'audace, encore de l'audace, toujours de l'audace

1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1
San Rensho is offline   Reply With Quote
Old 10-17-09, 02:43 PM   #7
Nessism
Senior Member
 
Nessism's Avatar
 
Join Date: Jun 2004
Location: Torrance, CA
Bikes: Homebuilt steel
Posts: 2,332
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by San Rensho View Post
Bead blasting followed by phosphoric acid etch is the only way to go if you really want a rust free frame forever.
Agree, but I recommend sand blasting at low pressure - 45 psi or so. Using paint stripper before blasting will speed up the process if your air compressor is weak (like mine).
__________________
Becareful buying/selling bike parts on-line. I learned the hard way. :(

Good/Bad Trader Listing
Nessism is offline   Reply With Quote
Old 10-17-09, 05:13 PM   #8
the_don
Senior Member
Thread Starter
 
the_don's Avatar
 
Join Date: May 2008
Location: Tokyo
Bikes:
Posts: 1,917
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I take it I want to remove the headset and the bottom bracket as well then.

I will ask my friend what equipment he has.  Again, I live in Tokyo and don't have ready access to a lot of equipment. But he has a lot, so I might be over his place to work on it!
the_don is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 11:15 PM.