Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

Need some info on powder coating

Notices
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.

Need some info on powder coating

Old 09-20-13, 06:00 AM
  #1  
okane
Senior Member
Thread Starter
 
okane's Avatar
 
Join Date: May 2009
Posts: 1,039
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 58 Post(s)
Liked 3 Times in 3 Posts
Need some info on powder coating

I have an 80's World Sport I want to get powder coated (don't ask me why....just want to do it).

A local firm https://www.custompowderandmetal.com/ will do frame/fork for $100 single color. Says he has done a number of bikes and knows all about keeping threaded and press fit areas clean so parts can be reinstalled without a problem.

Here's the problem...bike is already stripped but he says he will sand blast anyway and treat the frame with something to insure a good base for the powder coat/

I'm concerned that blasting might weaken the braze on, lug and drop out joints. I also heard that done incorrectly, it can warp metal. For the record, the World Sport has cromo main tubes, and the remainder hi-ten (I believe).

Are my concerns valid? Have you powder coated any older bikes. Thanks for any info.
okane is offline  
Old 09-20-13, 07:11 AM
  #2  
rhenning
Senior Member
 
Join Date: Apr 2006
Posts: 3,572
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 356 Post(s)
Likes: 0
Liked 72 Times in 51 Posts
If he doesn't sand blast the frame the powder will be bad any place that you have touched the bare metal and you will not see the problem until the frame comes out of the oven. Any good powder coater will always sand blast ( more probably media blast) before he/she does the coating. The blasting will not hurt a thing if the frame is in good condition. If it blows a hole because the frame was rusty you probably shouldn't have been riding it anyway. Your concerns are not valid. Roger
rhenning is offline  
Old 09-20-13, 07:39 AM
  #3  
SJX426 
Senior Member
 
SJX426's Avatar
 
Join Date: May 2008
Location: Fredericksburg, Va
Posts: 7,704

Bikes: '73 Bottecchia Giro d'Italia, '83 Colnago Superissimo, '84 Trek 610, '84 Trek 760, '88 Pinarello Veneto, '88 De Rosa Pro, '90 De Rosa Professional, '91 Pinarello Montello, '94 Burley Duet, 97 Specialized RockHopper, 2010 Langster, Tern Link D8

Mentioned: 55 Post(s)
Tagged: 0 Thread(s)
Quoted: 970 Post(s)
Liked 606 Times in 385 Posts
I would check with him if he really meant "sand" blast or not. Sand blasting will errode the metal thickness, something to avoid. Beyond that, it is a good thing for him to do a media blast as part of the preparation. I would not want it any other way.
SJX426 is offline  
Old 09-20-13, 08:08 AM
  #4  
oddjob2
Still learning
 
oddjob2's Avatar
 
Join Date: May 2012
Location: North of Canada, Adirondacks
Posts: 11,617

Bikes: Still a garage full

Mentioned: 91 Post(s)
Tagged: 2 Thread(s)
Quoted: 842 Post(s)
Liked 52 Times in 33 Posts
A $100 paint job on a $50 bike (the whole bike), always makes sense to me.

https://www.bikeforums.net/showthread...-schwinn-world

Worrying about a Schwinn frame being weakened? Only rust can do damage to it.

Like any finishing job, prep and cleanliness is everything. From the vendor's web site, it appears they know what they are talking about. Plus being in York, PA, they're Harley guys!
oddjob2 is offline  
Old 09-20-13, 08:17 AM
  #5  
lotek 
Senior Member
 
lotek's Avatar
 
Join Date: Dec 2001
Location: n.w. superdrome
Posts: 17,688

Bikes: 1 trek, serotta, rih, de Reus, Pogliaghi and finally a Zieleman! and got a DeRosa

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
I've done some sand blasting on the bikes I've painted. I spoke with David (Framebuilder) about concerns and we did a little test.
Steady stream on top tube of trashed bike, around cable braze ons. No discernible degradation of the tubes or the braze on.
Any frame prep will be much less concentrated so I wouldn't worry about it unless the frame has rust and is already compromised.
__________________
Sono più lento di quel che sembra.
Odio la gente, tutti.


Want to upgrade your membership? Click Here.
lotek is offline  
Old 09-20-13, 10:52 AM
  #6  
simmonsgc
Senior Member
 
simmonsgc's Avatar
 
Join Date: Dec 2010
Location: NC High Country
Posts: 657
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 83 Post(s)
Liked 12 Times in 8 Posts
Prep is everything (for either paint OR powdercoat). If you trust the guy, just let him do his thing. I media blasted my own 83 Trek frame, and took it to my guy wrapped in a plastic bag after being rubbed down with alcohol, and he STILL blasted it again. And it came out great.

simmonsgc is offline  
Old 09-20-13, 11:08 AM
  #7  
rccardr 
aka: Dr. Cannondale
 
rccardr's Avatar
 
Join Date: Jul 2009
Posts: 6,328

Bikes: Lots. Just...lots.

Mentioned: 176 Post(s)
Tagged: 0 Thread(s)
Quoted: 1471 Post(s)
Liked 712 Times in 360 Posts
Yep, all correct. Media blast (aluminum oxide is what I was told, but may be wrong), then a prep solution to ensure cleanliness and adequate 'tooth' for the PC to adhere.
__________________
Hard at work in the Secret Underground Laboratory...
rccardr is offline  
Old 09-20-13, 11:17 AM
  #8  
Cynikal
Team Beer
 
Cynikal's Avatar
 
Join Date: Apr 2004
Location: Sacramento CA
Posts: 6,168

Bikes: Too Many

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Liked 61 Times in 44 Posts
I've had 5 bikes powdercoated, everything from steel to Alu. Never an issue.
Cynikal is offline  
Old 09-22-13, 07:58 AM
  #9  
RobbieTunes
Banned
 
Join Date: Dec 2007
Posts: 27,297
Mentioned: 34 Post(s)
Tagged: 1 Thread(s)
Quoted: 378 Post(s)
Liked 1,370 Times in 884 Posts
I wish all my bikes had been originally blasted and powdercoated.

I've had a bunch done, from $60 disasters (over chrome) to $125 by an experienced coater with decals and follow-up clear coat, total of about $250. The vast majority have been great.

In my experience, few come out as great as older Cannondales.
RobbieTunes is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Shato37
General Cycling Discussion
11
11-25-17 08:13 AM
Shuffleman
Road Cycling
15
07-06-16 10:12 AM
Senior Ryder 00
Classic & Vintage
13
06-16-16 06:55 AM
smurray
Bicycle Mechanics
5
08-16-13 07:50 AM
RALEIGH_COMP
General Cycling Discussion
9
11-13-12 10:02 AM

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 - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.