Ospho, por15 and Pettit rustlok - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old May 14th, 2016, 05:59 PM
Naplm00
Status: Online
Matthew
1983 110 200tdi 3 door soft top
Member
 
Join Date: Sep 2010
Location: San Jose, California
Posts: 2,871
Ospho, por15 and Pettit rustlok

So after a ton of labor I have my front and rear axles degreased, wire brushed and stripped of peeling paint.

Front axle is a mix of fresh white metal and rusty but wire brushed metal.

Rear axle is brushed rusty metal.

I'm going to hit both with ospho first. Then the question is weather to use por15 and a topcoat or Pettit rustlok and a topcoat.


Also can I use ospho then let it sit for a week or two before I paint it?
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old May 14th, 2016, 08:28 PM
seaswood
Status: Offline
Craig
Diesel
Member
 
Join Date: Jul 2008
Location: Woods Hole
Posts: 202
Registry
Ospho

Quote:
Originally Posted by Naplm00 View Post
So after a ton of labor I have my front and rear axles degreased, wire brushed and stripped of peeling paint.

Front axle is a mix of fresh white metal and rusty but wire brushed metal.

Rear axle is brushed rusty metal.

I'm going to hit both with ospho first. Then the question is weather to use por15 and a topcoat or Pettit rustlok and a topcoat.


Also can I use ospho then let it sit for a week or two before I paint it?
To use Ospho properly you need to wash it off or mix it 50% water - Ospho. Should become a white powder. It should be stable once it has dried. Por is made to go on rusty metal sitting should not bother the final result.
Poor-15 by itself is not supposed to last in sunlight for this they have a top coat they sell.
I used the por basically everything under the truck your choice.
Reply With Quote
  #3  
Old May 14th, 2016, 08:42 PM
sonoronos's Avatar
sonoronos
Status: Offline
Ed
None
Member
 
Join Date: May 2010
Location: Arlington, VA
Posts: 5,550
Registry
seaswood is right - ospho has detergents which will prevent adhesion of paint if you don't wash it off.

btw - Kleen Strip Prep and Etch is much cheaper than Ospho and is basically the same stuff. Save your $$$.

No idea about the other stuff.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old May 14th, 2016, 09:04 PM
Naplm00
Status: Online
Matthew
1983 110 200tdi 3 door soft top
Member
 
Join Date: Sep 2010
Location: San Jose, California
Posts: 2,871
I've never rinsed previously using ospho, thought it was just water and phosphoric acid?
Reply With Quote
  #5  
Old May 14th, 2016, 10:30 PM
Squaretyre's Avatar
Squaretyre
Status: Offline
Landan
94 d90
Member
 
Join Date: Dec 2012
Location: Billings, MT
Posts: 269
Registry
por15 is fantastic but really spendy and particular on timeing if you want to paint over. Not sure I'd bother painting over it, but to each their own.

Good luck and please post pics whichever way you proceed.
Reply With Quote
  #6  
Old May 14th, 2016, 10:46 PM
sonoronos's Avatar
sonoronos
Status: Offline
Ed
None
Member
 
Join Date: May 2010
Location: Arlington, VA
Posts: 5,550
Registry
Quote:
Originally Posted by Naplm00 View Post
I've never rinsed previously using ospho, thought it was just water and phosphoric acid?
mostly that. there is also a detergent in there, which you can see in action if you put zinc in there.

the zinc will react with the phosphoric acid to form zinc phosphate and hydrogen gas. the evolved hydrogen will create a fine foamy layer, which is the detergent forming bubbles.

Either way, you gotta wash it off, acid and all. Unless you don't care
Reply With Quote
  #7  
Old May 14th, 2016, 11:02 PM
Naplm00
Status: Online
Matthew
1983 110 200tdi 3 door soft top
Member
 
Join Date: Sep 2010
Location: San Jose, California
Posts: 2,871
No I definitely care, ill add that step this time
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Por15 drdread Defender Technical Discussions 16 January 16th, 2015 06:48 PM
ospho - seems to work as promised sonoronos Defender Technical Discussions 13 February 2nd, 2012 10:18 PM
POR15 and topcoat for other surfaces? Hoosier Defender Technical Discussions 10 February 13th, 2009 06:43 PM
ospho rust primer rover4x4 Defender Technical Discussions 3 May 7th, 2007 07:24 AM
B and C pillar and other stuff and stuff for trade bstraw Wanted 2 January 10th, 2007 12:11 PM


All times are GMT -5. The time now is 10:18 PM.


Copyright