Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Frame Rust Removal

Old 01-18-08, 04:59 AM
  #1  
kayakboy
Senior Member
Thread Starter
 
Join Date: Jun 2005
Location: Bayer Area
Posts: 118

Bikes: Raleigh M60, Raleigh Supercourse (road), customs....

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Frame Rust Removal

I have an English lugged 531 touring bike with very prevalent rust. It is more than worth salvaging. I am planning on putting the whole frame in a molasses bath. Will this be OK for the frame? I am particularly concerned about the brazing. I am open to sanding it by hand or with a wheel, but I don"t want to remove any good steel. I am open to any other ideas too. Thank you, Ty
kayakboy is offline  
Old 01-18-08, 08:59 AM
  #2  
sced
South Carolina Ed
 
Join Date: Mar 2007
Location: Greer, SC
Posts: 3,475

Bikes: Family pool bikes - 73 Holdsworth Super Mistral, 79(?) Macario, 86 Bianchi Brava, 93 Viner Nemo, 07 Bottecchia Euro Team, 07 Windsor Fens, 07 Tommasso Mistral

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 180 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
What I have done is use paint stripper to remove all of the paint and primer; use a wire brush thingy on your drill to move as much of the rust as possible (and remaining paint); dabble naval jelly (or molasses solution?) where there are remaining rust spots; paint over any remaining spots of concern with the rust-stop stuff; coats of sandable primer, sanding in between to fill any pits; then paint. The prep prior to painting will go quickly (maybe 4 hrs work with time between primer coats) and the results will be very good to excellent.
sced is offline  
Old 01-18-08, 09:43 AM
  #3  
mazpr
Banned.
 
mazpr's Avatar
 
Join Date: Jul 2007
Location: East Side
Posts: 384

Bikes: Tirreno Razza 900, Trek 750

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
WD-40, tons of emery cloth and patience, no you don't need a case of beer to do the job.
mazpr is offline  
Old 01-18-08, 09:52 AM
  #4  
Mariner Fan
59'er
 
Mariner Fan's Avatar
 
Join Date: Oct 2005
Location: Alexandria, IN
Posts: 3,308

Bikes: LeMond Maillot Jaune, Vintage Trek 520 (1985), 1976 Schwinn Voyageur 2, Miyata 1000 (1985)

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Do a search for Oxalic Acid.
__________________
Mariner Fan is offline  
Old 01-18-08, 05:43 PM
  #5  
kayakboy
Senior Member
Thread Starter
 
Join Date: Jun 2005
Location: Bayer Area
Posts: 118

Bikes: Raleigh M60, Raleigh Supercourse (road), customs....

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I would like to but the whole frame in a bath. I have pondered reverse hydrolysis, molasses, and maby some sodium carbonate, but fear for the brazing in the lugs. Will naval jelly just stick to the frame so you can do it in phases? Thanks, Ty
kayakboy is offline  
Old 01-18-08, 07:36 PM
  #6  
Iowegian
Senior Member
 
Iowegian's Avatar
 
Join Date: Dec 2005
Location: Boulder, Colo
Posts: 1,975
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 76 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I don't think you have to worry about the brazing material but you do need to be concerned about the raw steel of the bike frame once the bath is done. The brazing was probably done with a silver alloy or brass. Neither one will be weakened by any normal rust treatement.

Oxalic acid does a great job of removing rust and prepping the steel for paint. I haven't tried molasses but it's supposed to work well too. Whatever you use, you need to apply something to the frame immediately since it will start to rust again once it's exposed to air.
Iowegian is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
N3gr8
BMX
1
12-28-16 01:26 AM
Jerry Agaim
Classic and Vintage Bicycles: Whats it Worth? Appraisals.
22
11-07-12 07:38 PM
rkelley23
Road Cycling
5
04-03-11 06:35 PM
timmyquest
Foo
17
02-15-08 01:27 PM

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

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.