Automotive Forums .com - the leading automotive community online! Automotive Forums .com - the leading automotive community online!
Automotive Forums .com - the leading automotive community online! 
-
Latest | 0 Rplys
Go Back   Automotive Forums .com Car Chat > Auto Collision Network
Auto Collision Network The forum for Automotive and Collision repair schools, instructors, teachers and individuals in the industry helping to produced better qualified employees. In association with A.D.Smith NACAT, CRIN, ASA.
Reply Show Printable Version Show Printable Version | Email this Page Email this Page | Subscription Subscribe to this Thread
 
Thread Tools Search this Thread
Old 06-15-2009, 12:35 PM   #1
Swansen
AF Newbie
 
Join Date: Apr 2004
Location: Freeland, Michigan
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to Swansen Send a message via Yahoo to Swansen
sanding base for clear?

Ok, so i'm doing a two tone and obviously you have to let one half dry before you can tape/shoot the other half. At that point i'll have one half the car wet and the other half dry, so do you need to sand the base coat down for the clear to stick well or? if so what grit should i use? thanks
Swansen is offline   Reply With Quote
Old 06-15-2009, 01:43 PM   #2
LearnAutoBody
Auto Body Mod
 
LearnAutoBody's Avatar
 
Join Date: Jan 2008
Location: El Dorado, Kansas
Posts: 155
Thanks: 2
Thanked 3 Times in 3 Posts
Re: sanding base for clear?

Every paint company has their own recommendations. However, when using PPG, shoot the first color and let it dry at least an hour, but no longer than 24 hours. If you shoot your second color within the 24 hour window, you will not have to sand base. If you wait longer than 24 hours, you can lightly scuff with gray 3M scuff pad.
__________________
DIY Auto Body Tutorials

"Coming together is a beginning; keeping together is progress; working together is success."
`Henry Ford
LearnAutoBody is offline   Reply With Quote
Old 06-15-2009, 02:08 PM   #3
Swansen
AF Newbie
Thread starter
 
Join Date: Apr 2004
Location: Freeland, Michigan
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to Swansen Send a message via Yahoo to Swansen
Re: sanding base for clear?

awesome thanks, i should have included this originally, but is it ok to tape off/over paint that isn't fully cured? just set up?

---edit----
Well, here are my thoughts, i'm trying to do all of this to minimize the tape line, and i want to clear coat both halves at the same time to try and minimize the visibility of the line. I'll probably do the bottom portion first, wait until its no longer tacky and tape an inconspicious spot to see how the paint reacts. If all goes well, i'll tape everything off and do the top half and then clear the car. However, if i get problems and the tape messed up the paint, i'll just let the bottom portion cure over night and tape everything off, like you suggested use a scuff pad and clear everything. I figure if i shoot the top portion second it will also minimize the line rather than bottom last. I'll report back when everything is all set, thanks for the help.

Last edited by Swansen; 06-15-2009 at 03:07 PM.
Swansen is offline   Reply With Quote
Old 06-26-2009, 11:00 AM   #4
Swansen
AF Newbie
Thread starter
 
Join Date: Apr 2004
Location: Freeland, Michigan
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to Swansen Send a message via Yahoo to Swansen
Re: sanding base for clear?

Ok, hoping i can figure out here... because after all my searching i have yet to find an answer. I have bottom portion done and i put on first coat of paint an realized a few spots on the body aren't as smooth as i thought they were. SO, the top half isn't even going to be an issue, going to have to sand it all down again anyways and finish coats so the clear will go on that wet.

BUT question i have not been able to find, specifically about what Learnautobody said, first, do i wet sand with the scotch pad and can i shoot the clear right over top of the scuffed surface? the swirls won't show up from the scotch pad?
Swansen is offline   Reply With Quote
Old 07-10-2009, 02:09 AM   #5
maxjlone
Banned
 
Join Date: Jul 2009
Location: france
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Re: sanding base for clear?

That is a good one. I can say this here the base should not be sanded before clearing.The finish job will only look as good as the base. Clear hides nothing so any problems in the base must be corrected first.

The only time you need to wet sand between clear coats is if you wait longer than 24 hours. Ideally it should be re-coated as soon as the the last coat has tacked. The final clear coat can be wet sanded and buffed if needed to get rid of any bugs, dirt or orange peel.
maxjlone is offline   Reply With Quote
Old 07-22-2009, 11:05 AM   #6
32streetrod
AF Newbie
 
Join Date: May 2009
Location: smyrna, Delaware
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Re: sanding base for clear?

Swanson
I am in the same boat as you ,but a body man told me that if you run your masking tape over to pants it will knock of alot of stickiyness and still stick to fresh paint and not pull off
try a inconspicious point
32streetrod is offline   Reply With Quote
Old 07-22-2009, 11:27 AM   #7
LearnAutoBody
Auto Body Mod
 
LearnAutoBody's Avatar
 
Join Date: Jan 2008
Location: El Dorado, Kansas
Posts: 155
Thanks: 2
Thanked 3 Times in 3 Posts
Re: sanding base for clear?

Clear will fill! If you use a gray 3m scuff pad or 1200 grit sandpaper. For example, when blending, you sand the surface to be cleared with a gray scuff pad or 1200 grit sandpaper. When you clear the area it will fill the scratches and produce a nice quality finish.

The problem with sanding base: is that you can discolor the metallic or sand through easy. That is why I would suggest using a mid-coat clear after spraying your base. This is just a base coat that is clear. The PPG number is 500. Therefore, the clear will fill the scratches, but will not cover sand through or discolored areas. If it is a solid color you should be fine.

What color are you shooting? Is it a metallic or pearl? That will help.

Thanks, Donnie
__________________
DIY Auto Body Tutorials

"Coming together is a beginning; keeping together is progress; working together is success."
`Henry Ford
LearnAutoBody is offline   Reply With Quote
Old 07-22-2009, 11:31 AM   #8
LearnAutoBody
Auto Body Mod
 
LearnAutoBody's Avatar
 
Join Date: Jan 2008
Location: El Dorado, Kansas
Posts: 155
Thanks: 2
Thanked 3 Times in 3 Posts
Re: sanding base for clear?

After looking over the posts again, I see that you are probably doing some art work or stripes. In this case, I highly recommend using mid-coat on top of each color you spray. This will prevent a lot of headaches. If you have to sand a little overspary off, you will not sand through the metallic or pearl. What brand of paint are you using?
__________________
DIY Auto Body Tutorials

"Coming together is a beginning; keeping together is progress; working together is success."
`Henry Ford
LearnAutoBody is offline   Reply With Quote
 
Reply

POST REPLY TO THIS THREAD


Bookmarks

Tags
base, clear, sand
Go Back   Automotive Forums .com Car Chat > Auto Collision Network

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -5. The time now is 04:39 PM.

Community Participation Guidelines | How to use your User Control Panel

Powered by: vBulletin | Copyright Jelsoft Enterprises Ltd.
 
 
no new posts