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06-06-2011, 06:34 PM
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#1 |
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Registered User
Join Date: Apr 2011
Location: corpus christi, tx - america's fattest city
Posts: 253
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OSPHO? Who's used it?
Read up on it after I Googled it, and I saw on other forums where guys were either swearing by it or swearing at it.
From what I read Ospho will work for what I want, when I'm ready to clean and paint the frame. Some have said that after the Ospho treatment if you strip it off the rust is still under it (but it's supposed to be, right?) and you still won't have a proper bond when you apply primer/paint. I'm kinda new to this. Just fishing for some thoughts, feelings, opinions, suggestions, etc. Consequently the guys that didn't recommend Ospho also didn't like POR15 for the same reason, tantamount to taking cheap short cuts that will come back to bite you later. What say you? |
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06-06-2011, 09:47 PM
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#2 |
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Registered User
Join Date: Jun 2011
Location: Atlanta ga
Posts: 150
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Re: OSPHO? Who's used it?
I use this stuff on all of my projects as a pre wash prior to primer. I let it soak in for about 20 minutes, and then wash it off. After the surface dries, I wipe it down with mineral spirits (depending on whatever paint/primer that you may be shooting).
I think that it works great on light surface rust; the rust turns black. This is not POR 15 or Rust bullet, but it is great for a pre wash to keep metal from flashing with rust. After treating, you will have about 24 hours of protection prior to painting. I buy this stuff at Home depot; it's only about $14 for a gallon. |
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06-06-2011, 09:52 PM
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#3 |
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Registered User
Join Date: Jun 2011
Location: Atlanta ga
Posts: 150
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Re: OSPHO? Who's used it?
On projects that i have used in it, the rust has not came back (even 2 years after paint. But again, I have only used this as a pre-wash prior to painting. If you have a real rust issue, don't expect this to turn rusted metal into new metal.
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06-07-2011, 12:09 AM
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#4 | |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,951
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Re: OSPHO? Who's used it?
Quote:
I wouldn't use it to "convert" rust for the same reason I wouldn't use POR15. Both may work... I think covering up the tumor just seems like a bad idea especially when you're actually trying to kill the cancer. Kinda like using face paint on a Carcinoma. |
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06-07-2011, 07:59 AM
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#5 |
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One shot, one kill.
Join Date: Dec 2007
Location: Saratoga Springs NY
Posts: 859
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Re: OSPHO? Who's used it?
I have never used this product you refer to. Something about putting acid on a steel product that may allow the product to get into tight spots you can't get rinsed out well bothers me. That said, on my restore over 3 years ago, I used POR 15 and followed the instructions to the letter and have not had a rust issue since. POR is not all that easy to use but it works. POR and like products actually need a very thin patena of rust to work. Key word here is thin. I sandblasted my frame, blew it off and then wet it and let it sit overnight before doing the paint work. You couldn't see the rust, but I know it was there. A word of advice, DO NOT use a wire brush to remove rust!!! All that does is polish it up real nice. Sandblast or grind. jim
__________________
1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shot  Jim or Paladin whichever you choose.
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