Sanding with 80 grit question - 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 12-24-2005, 08:53 AM
Registered User
 
Last photo:
Join Date: Nov 2005
Location: Colorado
Posts: 43
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Sanding with 80 grit question

Hi all,
I posted this question before but I don't think I got my point across. I started sanding my car with a DA and 80 grit. I have a '65 Mustang. The fenders have a sharp edge. I noticed that the 80 grit actually caused some small irregularities on the sharp edges that you could feel. I eased off on the edges and I still get them. Do I need to use a finer grit after the 80 to get rid of the irregularities before primer or will hi-build primer cover these up?
Merry Christmas!!!
Walt

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 12-24-2005, 09:30 AM
Rambo_The_Dog's Avatar
Registered User
 

Last journal entry: Shop Remodel Progress
Join Date: Dec 2005
Location: Pacific Northwest
Posts: 736
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Skipr
Hi all,
I posted this question before but I don't think I got my point across. I started sanding my car with a DA and 80 grit. I have a '65 Mustang. The fenders have a sharp edge. I noticed that the 80 grit actually caused some small irregularities on the sharp edges that you could feel. I eased off on the edges and I still get them. Do I need to use a finer grit after the 80 to get rid of the irregularities before primer or will hi-build primer cover these up?
Merry Christmas!!!
Walt

Hi Walt,

80 grit on a DA should not bite into the metal that much unless you left the pad on edge and in the same spot or you are hitting some old lead repair..

You must be feeling the 80grit scratches or I guessing there was some damage done before - without a picture though I am guessing.

I take it you are trying to strip the car or knock the paint down to a manageable spot but for stripping I normally sand with 80-100 grit and then etch prime (for bare metal) and then use the high build primer. As you go through the process of bodywork and block sanding with subsequently higher grit sandpaper and re-priming should smooth out these irregularities.

If you have a digital camera and get a chance post a picture out here maybe we can see better what you are trying to describe.

Dan
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 12-24-2005, 10:10 AM
pmeisel's Avatar
Glad the Jeep is on the road
 
Last wiki edit: How to identify a Ford V8
Join Date: Jan 2004
Location: Meridian MS & Vermilion Ohio
Age: 58
Posts: 814
Wiki Edits: 8

Thanks: 0
Thanked 1 Time in 1 Post
I do a lot of resanding and repainting boat bottoms (actually mostly mine, over and over) -- based on a suggestion from a couple local pros I usually use 120 grit or 180 grit. It doesn't take much longer and you get a better surface. I'm no expert, but try it and see how it works for you.

From 80 I would jump to 180 -- but if I was starting fresh I'd try one piece of 120 and one of 180 from the get go.

From the 180 I go to 320, and then the VC17 if there are any sailboat racers on here!
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 12-24-2005, 10:27 AM
Registered User
 
Last wiki edit: How to title a hot rod Last photo:
Join Date: Jul 2003
Posts: 189
Wiki Edits: 6

Thanks: 0
Thanked 0 Times in 0 Posts
You shouldn't have any problems using 80 on the DA. Your bodywork and primers should sharpen your lines as needed. 80 can't take that much off unless you're trying hard to make it happen.

Larry
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 12-24-2005, 10:45 AM
Rambo_The_Dog's Avatar
Registered User
 

Last journal entry: Shop Remodel Progress
Join Date: Dec 2005
Location: Pacific Northwest
Posts: 736
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by pmeisel
I do a lot of resanding and repainting boat bottoms (actually mostly mine, over and over) -- based on a suggestion from a couple local pros I usually use 120 grit or 180 grit. It doesn't take much longer and you get a better surface. I'm no expert, but try it and see how it works for you.

From 80 I would jump to 180 -- but if I was starting fresh I'd try one piece of 120 and one of 180 from the get go.

From the 180 I go to 320, and then the VC17 if there are any sailboat racers on here!
For metal re-finishing you want the base etch primer and first fill primer coat to have something better to stick to than 180 which IMO is too fine for that to happen...then your first block sanding should be with 150-180 grit with subsequent fill primer coats and blocking out to 320-400 for final finishing.

Fiberglass is a different beast because if you leave 80 grit scratches in the gelcoat it will shrink back and haunt you.
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
Flexible sanding blocks Chapo1 Body - Exterior 33 05-30-2012 07:46 PM
Question on Duplicolor Lacqueur quality and longevity viperACR Body - Exterior 9 11-02-2004 04:20 PM
The 80 Hp Question big455 Engine 8 07-22-2003 06:58 AM
Hotrodders Guidelines -- READ ME Jon Engine 0 06-14-2003 04:53 PM
Body Work trick66 Body - Exterior 5 03-01-2003 01:18 PM


All times are GMT -6. The time now is 01:54 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.