1st paint job sanding help... - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



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

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 09-09-2014, 08:41 AM
Registered User
 
Join Date: Sep 2014
Posts: 2
Wiki Edits: 0

Thanks: 4
Thanked 0 Times in 0 Posts
1st paint job sanding help...

I am attemptimg to repaint my 1977 GMC k15. It seems it has been painted 1 or 2 times in the past. I dont have the money to have it media blasted and cannot strip the entire truck to bare sheet metal. It has a coupe of chips and couple small spots where last paint job is flaking. Can i just sand the truck down and shoot the whole thing with a primer to seal it? what grit and what type of primer?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 09-09-2014, 08:51 PM
carolinacustoms's Avatar
Automotive Extraordinaire
 
Join Date: Dec 2012
Location: Connelly Springs NC
Age: 37
Posts: 1,278
Wiki Edits: 0

Thanks: 600
Thanked 351 Times in 288 Posts
First of all, of course going to bare metal is the best option for a long lasting paint job, however, I understand not everyone wants/needs a $10K paint job. You can get a good job for a daily driver without stripping/blasting, but remember that the top coat is no better than the first coat on the bare metal and could fail at any time.

With all of that said to avoid any confusion on best and "bestest" way (to quote MartinSr) 80 grit on a DA sander (even if it is one of the cheapy HF electric ones) will make fairly quick work of it. Keep the sander flat and the speed low to keep the heat low and make the paper last longer. Try to stay away from body lines and edges with the sander, you can easily round sharp line if you are not experienced with a sander. On the places where it is flaking, take a razor blade scraper and remove anything that will come off, then feather in everything with the 80 grit. Once you have everything ready, you can use a polyester high build, a 2K urethane, or an epoxy primer. I would likely use a poly or urethane since you are not going to bare metal. You could also get a long block and some 80 grit to block sand the truck first, so you know where all of the low spots are. Essentially you would be using the existing paint as a pirmer coat to help level things out.

Kelly
Reply With Quote Quick reply to this message
The Following User Says Thank You to carolinacustoms For This Useful Post:
jayzeno78 (09-10-2014)
  #3 (permalink)  
Old 09-10-2014, 05:02 AM
deadbodyman's Avatar
Registered User
 
Last wiki edit: Stripping paint
Join Date: Feb 2009
Location: augusta,ga.
Age: 59
Posts: 7,950
Wiki Edits: 11

Thanks: 104
Thanked 1,463 Times in 1,115 Posts
For a quick basic paint job and I'd sand it with 180 and prime it with SPI epoxy ,guidecoat it then dry sand it with 320 and paint it...
Reply With Quote Quick reply to this message
The Following User Says Thank You to deadbodyman For This Useful Post:
jayzeno78 (09-10-2014)
 
  #4 (permalink)  
Old 09-10-2014, 11:38 AM
Registered User
 
Join Date: Sep 2014
Posts: 2
Wiki Edits: 0

Thanks: 4
Thanked 0 Times in 0 Posts
Thanks for the help guys!!! After I block it sand it and discover the lowspots, do i spray just the lowspots with more primer or the entire truck again and then re sand? basically after i see all the lowspots how do i fill them?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 09-10-2014, 12:24 PM
Methodical's Avatar
Registered User
 
Join Date: Jun 2014
Location: MD
Posts: 81
Wiki Edits: 0

Thanks: 6
Thanked 2 Times in 2 Posts
According to Deadbody comment in one of my post, you'd spray the repaired spot only and go to work getting it leveled.
Reply With Quote Quick reply to this message
The Following User Says Thank You to Methodical For This Useful Post:
jayzeno78 (09-10-2014)
  #6 (permalink)  
Old 09-10-2014, 07:53 PM
carolinacustoms's Avatar
Automotive Extraordinaire
 
Join Date: Dec 2012
Location: Connelly Springs NC
Age: 37
Posts: 1,278
Wiki Edits: 0

Thanks: 600
Thanked 351 Times in 288 Posts
Quote:
Originally Posted by jayzeno78 View Post
Thanks for the help guys!!! After I block it sand it and discover the lowspots, do i spray just the lowspots with more primer or the entire truck again and then re sand? basically after i see all the lowspots how do i fill them?

The depth of the low spot will determine the way it is fixed. Some may be able to be leveled with primer, others may need filler to level them out. Once you find the low spots, you can prime just the spots until everything is leveled then spray the entire truck and block it all one more time to get everything even and consistent.

Kelly
Reply With Quote Quick reply to this message
The Following User Says Thank You to carolinacustoms For This Useful Post:
deadbodyman (09-11-2014)
  #7 (permalink)  
Old 09-13-2014, 06:34 PM
deadbodyman's Avatar
Registered User
 
Last wiki edit: Stripping paint
Join Date: Feb 2009
Location: augusta,ga.
Age: 59
Posts: 7,950
Wiki Edits: 11

Thanks: 104
Thanked 1,463 Times in 1,115 Posts
those trucks are pretty wavey anyways dont expect to much of yourself...it takes a LOT of experiance and patience to get them super straight....as long as you get all the dents and dings out it'll look good and you'll be very happy with yourself. use a solid color SS paint and you'll really get a good job on the cheap..
Reply With Quote Quick reply to this message
The Following User Says Thank You to deadbodyman For This Useful Post:
jayzeno78 (09-13-2014)
  #8 (permalink)  
Old 09-17-2014, 11:57 AM
Methodical's Avatar
Registered User
 
Join Date: Jun 2014
Location: MD
Posts: 81
Wiki Edits: 0

Thanks: 6
Thanked 2 Times in 2 Posts
Hey Kelly what speed is best on the DA?

Thanks...Al
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 09-17-2014, 10:15 PM
deadbodyman's Avatar
Registered User
 
Last wiki edit: Stripping paint
Join Date: Feb 2009
Location: augusta,ga.
Age: 59
Posts: 7,950
Wiki Edits: 11

Thanks: 104
Thanked 1,463 Times in 1,115 Posts
Quote:
Originally Posted by Methodical View Post
Hey Kelly what speed is best on the DA?

Thanks...Al
what kind of da do you have? what grit are you using? its more of a feel than RPM's
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 09-18-2014, 10:46 AM
Methodical's Avatar
Registered User
 
Join Date: Jun 2014
Location: MD
Posts: 81
Wiki Edits: 0

Thanks: 6
Thanked 2 Times in 2 Posts
A $100 Ingersol Rand.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 09-18-2014, 11:10 PM
carolinacustoms's Avatar
Automotive Extraordinaire
 
Join Date: Dec 2012
Location: Connelly Springs NC
Age: 37
Posts: 1,278
Wiki Edits: 0

Thanks: 600
Thanked 351 Times in 288 Posts
Generally speaking, on the air DA with most grits, just enough air to keep the sander moving at a steady pace. Basically as slow as possible. Your paper will last longer and will cut better, plus you are less likely to destroy anything.
There should be an adjustment/flow valve near the back where the air fitting goes in to adjust flow to the sander. Be sure you hold it flat with even but light pressure.

Kelly
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 09-19-2014, 04:08 AM
deadbodyman's Avatar
Registered User
 
Last wiki edit: Stripping paint
Join Date: Feb 2009
Location: augusta,ga.
Age: 59
Posts: 7,950
Wiki Edits: 11

Thanks: 104
Thanked 1,463 Times in 1,115 Posts
if your stripping paint off with 80 grit be especially aware of how hot the panel is getting you can warp it if the da is going to fast check with your hand once in a while to see how hot its getting ...I have a valve on the end of my hose I set so regulate the max pressure.
like kelly says slow as you can
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 09-19-2014, 12:06 PM
Methodical's Avatar
Registered User
 
Join Date: Jun 2014
Location: MD
Posts: 81
Wiki Edits: 0

Thanks: 6
Thanked 2 Times in 2 Posts
Thanks. I did check when I used the DA to make sure the panel was not getting overly hot. I read that the speed should be set at about 75% of full bore and just wanted to be sure that I was using it correctly.

Al
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 09-19-2014, 01:54 PM
deadbodyman's Avatar
Registered User
 
Last wiki edit: Stripping paint
Join Date: Feb 2009
Location: augusta,ga.
Age: 59
Posts: 7,950
Wiki Edits: 11

Thanks: 104
Thanked 1,463 Times in 1,115 Posts
its more of a feel thers no set air pressure ...compressors are all different its more of a feel ,too fast and the paper wears out too slow and it takes forever you just have to get a feel for it it takes a while to get good at it when I trained guys for prepping it took them about three weeks of constant sanding with me watching before I could relax a little and let them at it alone.
Reply With Quote Quick reply to this message

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:
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:
Insurance
Please select your insurance company (Optional)

Log-in



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
Extremely bumed about 1st paint job... flipp121 Body - Exterior 17 03-29-2006 04:46 AM
Thinking of doing 1st paint job. Am I crazy? Magnus_Jager Body - Exterior 9 02-06-2006 08:03 AM
1st Paint Job Camarofiend73 Body - Exterior 9 10-06-2005 11:22 PM
1st paint job woes gazrnr Body - Exterior 10 05-22-2005 03:33 PM
1st pearl/flake paint job tell me what u think. ChrisMiddleron Body - Exterior 3 11-15-2003 11:02 PM


All times are GMT -6. The time now is 09:12 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.