Welcome to the THE H.A.M.B. forums.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

Go Back   THE H.A.M.B. > General Discussion > The Hokey Ass Message Board

Reply
 
Thread Tools Display Modes
Old 07-19-2010, 07:11 PM   #1
dodgerodder
Senior Member
 
dodgerodder's Avatar
 
Join Date: Feb 2005
Location: Ft Myers FL
Posts: 1,946
Default Need some PPG DP90LF advice

I need the help of somebody with some experience shooting
PPG DP90LF
. I am using this on my Brookville rpu, so it is all clean new steel.

I am a paint idiot. I spoke with PPG for their advice, & I do trust them fully. I would just like some advice from somebody with hands-on experience.

PPG said the DP90LF has to go on top of their 1791/1792 etch on bare steel, and they do not recommend spraying the DP90LF direct to bare metal. Does this sound like the way you would do it if it were your car?

Again, I am not questioning PPG, and don't want to take a short cut at this point. I just want to be sure that I am giving my car the best protection possible. I have heard other say that the DP90 works great on bare metal??? I figure the manufacturer knows best

Thanks in advance for your help guys, I really appreciate!

Dan
__________________
Good work ain't cheap, Cheap work ain't good...

Last edited by dodgerodder; 07-20-2010 at 12:45 AM.
offline   Reply With Quote
Old 07-19-2010, 07:15 PM   #2
THE235KID
Old School HAMBer
 
THE235KID's Avatar
 
Join Date: Apr 2007
Location: Canton, Texas
Posts: 3,789
Default Re: Need some PPG DP90LF advice

I do it all the time. Make sure the metal is roughed up good before spraying it. I 80 grit it with a DA sander before hand. Make sure and do the whole thing. Every little spot or it won't stick.
offline   Reply With Quote
Old 07-19-2010, 07:21 PM   #3
buckeye_01
Senior Member
 
buckeye_01's Avatar
 
Join Date: Jun 2005
Location: Sullivan, Ohio
Posts: 1,476
Default Re: Need some PPG DP90LF advice

I've sprayed tons of bare steel panels with it and never had a problem. As mentioned above, hit it with 80 on a DA to give the panel a little tooth before spraying it.
__________________
-Jon
offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 07-19-2010, 07:24 PM   #4
brandon
Old School HAMBer
 
brandon's Avatar
 
Join Date: Jul 2002
Location: southern end of fatwoody
Posts: 6,211
Default Re: Need some PPG DP90LF advice

dust the last coat , for that less than gel coat look
offline   Reply With Quote
Old 07-19-2010, 07:27 PM   #5
40StudeDude
Old School HAMBer
 
40StudeDude's Avatar
 
Join Date: Sep 2002
Location: Aurora, CO USA
Posts: 8,518
Default Re: Need some PPG DP90LF advice

I've used DPLF50 (virtually the same stuff) on several of my cars...right over bare metal (one car I did 8 years ago and ran it that way for four)...it's never released and would take 36 grit to get it off now...and I just did my '55 Caddy the same...I wouldn't hesitate to put it over bare metal again...

R-
offline   Reply With Quote
Old 07-19-2010, 07:35 PM   #6
jonathan
Grenade Inspector
 
jonathan's Avatar
 
Join Date: Feb 2007
Location: Phoenix,AZ
Posts: 397
Default Re: Need some PPG DP90LF advice

Yup. Rough it up with 80 on a DA first. And make sure to get into the corners of the body lines with some folded up 80 by hand. It's a chore and takes time, but you don't want to take any chances.
__________________
<-- Forlorn, but not forgotten.
offline   Reply With Quote
Old 07-19-2010, 07:50 PM   #7
customcarpainter
Grenade Inspector
 
customcarpainter's Avatar
 
Join Date: Jul 2001
Location: Hokes Bluff,Al,35903
Posts: 200
Default Re: Need some PPG DP90LF advice

I'd have to question the advice you were given.Epoxy primer isnt supposed to be applied over etch primer,I would ask the PPG rep again.I apply DP90LF over bare metal all the time,I use the DP401LF as the activator.
offline   Reply With Quote
Old 07-19-2010, 08:11 PM   #8
pimpin paint
Old School HAMBer
 
pimpin paint's Avatar
 
Join Date: May 2005
Location: so cal
Posts: 4,948
Default Re: Need some PPG DP90LF advice

Hey,

Given that Ditzler/PPG's DP90LF no longer contains any lead, cad or zinc, I'd move over to a full urethane primer! "Perhaps" the PPG rep was thinkin' the additional etch prime would help the DPLF to perform as the product had in years past, when it contained these metals?

" Do not be too quick to drink the Kool-Aid "
offline   Reply With Quote
Old 07-19-2010, 08:13 PM   #9
40fordtudor
Senior Member
 
40fordtudor's Avatar
 
Join Date: Jan 2010
Location: rowlett, tx
Posts: 2,018
Default Re: Need some PPG DP90LF advice

we shot DP90 on the 40 right over bare metal
__________________
"Life is hard; it's even harder when you're stupid." John Wayne
offline   Reply With Quote
Old 07-19-2010, 08:26 PM   #10
Weedburner 40
Grenade Inspector
 
Weedburner 40's Avatar
 
Join Date: Jan 2006
Location: California
Posts: 267
Default Re: Need some PPG DP90LF advice

We've been using the DP series on bare metal for 30+ years. One thing that we have always done is to use Metal Prep/Galva Prep on it. This is an etching/phosphatising step that makes the primer stick extremely well. The no lead is an issue now but it still works great.
__________________
There's no ride like a low ride, bags are for trash !

www.weedetrstreetrod.com
offline   Reply With Quote
Old 07-19-2010, 08:31 PM   #11
built2grind
Newbie
 
built2grind's Avatar
 
Join Date: Dec 2009
Location: WEST COAST, California
Posts: 88
Default Re: Need some PPG DP90LF advice

Dan

I use this stuff all the time on my projects. Its a great product to use but not as great as the old stuff (DP90). DP90LF is designed to be a lead free "sealer" primer and used directly over bare metal. I would rough up the surface with a DA sander using 80 grit or bead blast it, which ever you prefer. Clean the surface good using a wax and grease remover. Mix the sealer according to the label, 2 parts DP90LF primer to 1 part DP402LF hardener. Let it sit in the pot for about 10 minutes, this gives the product time to mix and react with each other. Now its time to spray. Give it 2 coats for even coverage but 3 coats is even better. Don't forget to wait 5 minutes between coats to avoid drips, runs, or sags. I've heard you can apply body filler right over it but I suggest roughing up the surface with a grinder to promote adhesion. You can can even use it as a sealer right before painting your car, just reduce it with PPG DT870 reducer about 10% and it flows real nice. Hope this helps.
__________________
"DRIVE IT LIKE YOU STOLED IT"
offline   Reply With Quote
Reply

Thread Tools
Display Modes

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 On

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 12:44 AM.