Go Back   DIY Chatroom Home Improvement Forum > Do It Yourself > Automotive Repairs

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 03-31-2013, 07:06 PM   #1
Member
 
Join Date: Feb 2009
Location: Minnesota
Posts: 79
Share |
Default

Rust converter (phosphoric acid) not working


I'm trying to fix a rust spot on my car cheaply and quickly, so it looks better when I sell it soon. I've read rave reviews about Ospho, which is mainly phosphoric acid, and lots of people recommended a generic version called Prep & Etch, which is only $15 at Home Depot for a gallon.

I bought the Prep & Etch, which is also phosphoric acid based, and brushed off the loose rust, cleaned it and applied the P&E. Just a small part of the rust spot turned black, but there was still lots of visible rust showing through. I figured that because it was a vertical surface, maybe it didn't stay wet for long enough and that's why it didn't work. So on another day, I cleaned the rust spot again, and put about 8 coats of P&E on it, spaced out over about a 30 minute period. Still the rust shows through, and the spot is still more orange than black.

I also tried the P&E on some rusty tools, and they too still appear rusty.

Did I get a bad batch of this stuff or am I doing something wrong? Others who have used this who've posted on other forums talk about the amazing results this stuff has on anything that is rusty.

Studly is offline   Reply With Quote
Old 03-31-2013, 09:53 PM   #2
Member
 
ukrkoz's Avatar
 
Join Date: Dec 2010
Posts: 571
Default

Rust converter (phosphoric acid) not working


Always get what you paid for.
This one works.

http://www.jamestowndistributors.com...ct.do?pid=2584

ukrkoz is online now   Reply With Quote
Old 04-03-2013, 08:51 PM   #3
Household Handyman
 
Join Date: Feb 2009
Location: Albany, Ga.
Posts: 2,270
Default

Rust converter (phosphoric acid) not working


From experience working on older cars: I have used two different brands of this "Ortho" type rust neutralizers, and neither were big box store diluted solutions. Both of the solutions I have used plainly state something to the effect: "More than one coating of this material will not neutralize the rust better than a single properly applied coating." Maybe the stuff you buy at a big box store has been diluted way too much to work properly. Automotive paint stores carry the somewhat "professional" solutions and they are worth the pricing. I have used a brass bristled (fine bristles) brush to rub the solution in while it is still wet. Wiping off with something clean before it dries.
Thurman is offline   Reply With Quote
Old 05-02-2013, 06:57 PM   #4
English Only Please
 
BirdSlapper's Avatar
 
Join Date: Apr 2013
Location: Anoka, MN
Posts: 80
Default

Rust converter (phosphoric acid) not working


I've had great success with POR-15 from an auto body supply shop. First, grind all rust out, then use the prep stuff for a few coats and let dry. Then apply the POR-15 for a few coats. It will turn black and stay that way as long as the area isn't forced to constantly sit in salt water. I treated the lower inner doorskins and lip of the tailgate of my old Ford truck then had it Ziebarted. 4 years later when I traded it in (should have kept it) no sign of rust anywhere.
BirdSlapper is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
I-Beam, Rust & Concrete kinghong1970 Concrete, Stone & Masonry 13 03-29-2013 11:59 AM
Lights and outlets stopped working (hot and ground crossed?) JordonBoss Electrical 2 03-13-2013 07:12 AM
Hot surface igniter and gas valve not always working during call for heat Modify_inc HVAC 12 12-10-2012 05:46 PM
Creating a working space helpinggirl General DIY Discussions 10 11-14-2012 08:18 PM
Cleaning brush StevenH Painting 19 02-05-2011 11:13 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.