Runs and Orange Peel on Epoxy Primer? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Body - Exterior
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 03-20-2009, 05:08 PM
Member
 
Last photo:
Join Date: Jun 2002
Location: NYC
Posts: 803
Wiki Edits: 0

Thanks: 5
Thanked 3 Times in 3 Posts
Runs and Orange Peel on Epoxy Primer?

I shot my tour pack today with Shopline Epoxy Primer. Not thinking correctly, I did not aloow myself enough romm aroundthe tour pack to freely move around it to shoot it. So I have some runs. Plus, the first coat was not heavy enough and I developed some Orange peel. Can I sand out my mistakes? If so, do I have to reshoot it with EP?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 03-20-2009, 05:25 PM
CQNRQY
 
Last photo:
Join Date: Feb 2009
Location: Ontario Canada
Age: 58
Posts: 175
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
I don't see any way but to sand out the runs and orange peel. make a smooooth surface and re shoot it with a nice even coat of primer
It's the prep work that counts
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 03-31-2009, 01:00 AM
Member
 
Last photo:
Join Date: Jun 2002
Location: NYC
Posts: 803
Wiki Edits: 0

Thanks: 5
Thanked 3 Times in 3 Posts
I'm wet sanding it with 320 and it's coming out good. Once I finish with the 320, I'll go over it again with 600 and then 1000.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 03-31-2009, 07:12 AM
cboy's Avatar
Member
 

Last journal entry: Finished
Last photo:
Join Date: Jan 2004
Location: Atwater, CA
Age: 69
Posts: 3,913
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by Coodeville
Once I finish with the 320, I'll go over it again with 600 and then 1000.
I'm just a novice painter so won't hazard an opinion. But perhaps some of the pro painters will chime in to discuss the pros and cons of taking the epoxy down to 600 or 1000 and the potential for adhesion problems.
__________________
Always learning...and sharing what I've learned. The Scratch-Built Hot Rod.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 03-31-2009, 10:29 AM
Member
 
Last photo:
Join Date: Jun 2002
Location: NYC
Posts: 803
Wiki Edits: 0

Thanks: 5
Thanked 3 Times in 3 Posts
Quote:
Originally Posted by cboy
I'm just a novice painter so won't hazard an opinion. But perhaps some of the pro painters will chime in to discuss the pros and cons of taking the epoxy down to 600 or 1000 and the potential for adhesion problems.
Initially, It came out with runs and orange peel on it so I had to sand it down. I was using a 1.0mm nozzle. I now have the recommended 1.6mm nozzle to use. After I finish that, I'll scuff it and put another coat onto it just like the sheet says.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 03-31-2009, 11:39 AM
cboy's Avatar
Member
 

Last journal entry: Finished
Last photo:
Join Date: Jan 2004
Location: Atwater, CA
Age: 69
Posts: 3,913
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by Coodeville
...I was using a 1.0mm nozzle. I now have the recommended 1.6mm nozzle to use.
Again just another novice question on my part. Won't the 1.6 tip be even more prone to runs and sags than the 1.0 tip?
__________________
Always learning...and sharing what I've learned. The Scratch-Built Hot Rod.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 03-31-2009, 12:13 PM
Registered User
 
Last photo:
Join Date: Oct 2007
Location: Portland,Or
Posts: 820
Wiki Edits: 0

Thanks: 0
Thanked 40 Times in 34 Posts
I am not a pro painter by any definition, and I am going to guess I am probably the least experienced person who held a spray gun, who is going to respond to this post.
Orange peel tells me the paint is too dry, and did not flow out.
Runs tell me the paint is too wet, and flowed off.
I believe the major problem is with your consistancy. With me, by far my greatest problem is consistancy with gun techniques. Is the gun perpendicular to the surface? Is the the gun the same distance to the surface, throughout the entire stroke? Is the overlap the same on each stroke? Is the gun speed the same on each stroke?
Is the paint the same visiosity each time? Is the temperature the same? Do you allow the same time for each coat to flash off, in different areas?
Notice I have not even mentioned tip sizes, air pressure, and many other variables.
Take careful notes of everything you can the next time you paint. Try to see what changes you do causes what effect. Try to be really consistant, and you should get much better results.
Trust me, I have done more than one paint application that has orange peel and runs on the same piece. It is part of the learning process. Take pride you are learning to do this yourself, and not just buying a paint job. Want to have some fun, try painting spoked wheels sometime.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 03-31-2009, 06:38 PM
Member
 
Last photo:
Join Date: Jun 2002
Location: NYC
Posts: 803
Wiki Edits: 0

Thanks: 5
Thanked 3 Times in 3 Posts
Part of my problem wasthat I could not move around the piece freely and the gun stopped moving. One time I almost fell to the ground I've remedied that situation. The 1.6 will allow more paint to go though the gun making it wetter.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 04-08-2009, 08:39 PM
Registered User
 

Last journal entry: Several Car Projects
Last photo:
Join Date: Jan 2008
Location: Minnesota
Posts: 32
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
If you have enought primer just sand

Quote:
Originally Posted by Coodeville
Part of my problem wasthat I could not move around the piece freely and the gun stopped moving. One time I almost fell to the ground I've remedied that situation. The 1.6 will allow more paint to go though the gun making it wetter.

If you layed enough primer down that you can take out the runs and make it nice and smooth, then you don't have to respray primer. If you think that you can see metal through a thin spot of primer then I would go through the trouble of re-primering.

If you are using a reduced PPG primer as a sealer and your can see a little metal, no big deal. Continue with the sealer and paint.

There are two types of papers out there that are used on primers. Stearated (dry lubricant-looks and feels like baby powder) and non-stearated sandpaper. Typically non-stearated paper is used to sand with water. Stearated paper does not need water.

I work with a lot of OEM car plants that they repair primer using a 500grit dry or a 600 grit wet.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 04-08-2009, 11:22 PM
Member
 
Last photo:
Join Date: Jun 2002
Location: NYC
Posts: 803
Wiki Edits: 0

Thanks: 5
Thanked 3 Times in 3 Posts
I've been sanding it and it's getting real smooth. The primer is getting real thin but I'm not worried. Once I get it to were I want it, I'll shoot it again. I'm taking my time becasue I want it to come out right.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 04-09-2009, 12:50 AM
Registered User
 
Join Date: Feb 2006
Location: Oklahoma
Posts: 63
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
runs and orange peel on epoxy primer

hey, coodeville. The bigger fluid tip of the gun, the more orange peel! Spraying a heavier coat will tend to flow out better, but drying times and film thickness are increased, as are the chances of runs. Epoxy is slow to sand, and will need to be re-sealed to hide the scratches. Use the smaller-tipped gun with maybe a little more pressure, and spray the sealer a little lighter.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 04-09-2009, 07:26 AM
cyclopsblown34's Avatar
Colorsanding painter
 
Last photo:
Join Date: Feb 2006
Location: Russellville, Missouri
Age: 47
Posts: 976
Wiki Edits: 0

Thanks: 98
Thanked 6 Times in 6 Posts
Coodevile, if you're getting orange peel turn down the fluid a little bit. With the 1.6 tip and a clear pathway you might be able to maintain a more consistent pace around it and avoid the runs and orange peel. Sounds like you might have remedied the causes of the initial problems. With the 1.6 tip, you won't be making multiple passes to achieve coverage so the material should lay out and flow better. Use a test panel and Brian Martin or Barry K's tips on spray technique. Brian is MartinSr and the tips are on Autobody101 and BarryK is on Southern Polyurethanes website. Both men have excellent tips on gun setup.

Last edited by cyclopsblown34; 04-09-2009 at 07:43 AM.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 04-09-2009, 07:42 AM
35WINDOW's Avatar
Member
 

Last journal entry: Dash Mock-up
Last photo:
Join Date: Dec 2004
Location: utah
Age: 58
Posts: 1,365
Wiki Edits: 0

Thanks: 7
Thanked 17 Times in 16 Posts
From the SPI website:

"A simple formula to remember is orange peel is fluid adjustment and run control is an air pressure adjustment. "

And I agree, the Fluid Tip is probably too big-I think it should be in the 1.3-1.4 range, I believe-
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 04-09-2009, 10:09 AM
Member
 
Last photo:
Join Date: Jun 2002
Location: NYC
Posts: 803
Wiki Edits: 0

Thanks: 5
Thanked 3 Times in 3 Posts
Initially when I sprayed the epoy primer, I used the 1.0 mm that came with the gun. ( I'm using the Eastwood HVLP unit). The sheet says to use at least a 1.3 and no more than a 1.8mm. Next time around I'm goingto use the 1.4mm that is avaialble for this gun. I'll let you know how it comes out.
Reply With Quote Quick reply to this message

Recent Body - Exterior posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
More on Orange Peel KarKen Body - Exterior 36 03-22-2009 02:18 PM
1st bc/cc -- epoxy prep help needed grouch Body - Exterior 96 12-17-2008 12:38 AM
another epoxy question. oldguy829 Body - Exterior 7 06-01-2008 08:35 AM
Orange peel with runs cyclopsblown34 Body - Exterior 20 03-18-2008 03:09 PM
primer orange peel help jerrylo Body - Exterior 11 10-28-2004 05:52 PM


All times are GMT -6. The time now is 03:52 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.