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Ospho question


 
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Mike(NEOhio)
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Joined: 12 May 2013
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Location: Geauga County, Ohio

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PostPosted: Fri Jan 20, 2023 3:36 pm    Post subject: Ospho question Reply to specific post Reply with quote

My first time using it on some small parts. It seems to leave a coating after it dries. Should that be wire brushed or just primed right over it?
 
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WESnIL
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PostPosted: Sat Jan 21, 2023 3:01 pm    Post subject: Re: Ospho question Reply to specific post Reply with quote

Prime right over it.
 
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showcrop
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PostPosted: Fri Jan 27, 2023 10:19 am    Post subject: Re: Ospho question Reply to specific post Reply with quote



I wonder what sort of coating? white powder? and how much? I use other brands of rust converter and sometimes I get a white powder. If there is much I wash it off.
 
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Mike(NEOhio)
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PostPosted: Fri Jan 27, 2023 10:54 am    Post subject: Re: Ospho question Reply to specific post Reply with quote

Mostly black to clear, only a few spots of white which I brushed off. I also brushed the spots where it formed beads and dried to what looked like a
paint run.
 
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Dave G9N
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PostPosted: Mon Feb 13, 2023 12:17 pm    Post subject: Re: Ospho question Reply to specific post Reply with quote

CVPost-Mike(NEOhio) wrote:
(quoted from post at 16:36:27 01/20/23) My first time using it on some small parts. It seems to leave a coating after it dries. Should that be wire brushed or just primed right over it?
The residue is iron phosphate. It is a good paint base and provides some protection between cleaning and priming. It also holds oil on surfaces you can't paint like a table saw.
 
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