Posted by gmharris [69.231.16.116] on Thursday, January 01, 2015 at 00:53:40 :
In Reply to: Re: Phosphoric Acid Question? posted by Willy-N [72.171.192.60] on Thursday, January 01, 2015 at 00:27:44 :
Make sure it is DTM (direct to metal) or you may have to apply some other product first. Follow manufacturer's data sheet.
If you have flash rust, you can kill it with phosohoric acid. But, you may then have to neutralize the acid before spraying. Don't over apply the acid. Any acid not used to convert the rust remains on the metal. Some epoxy products do not work well with acid.
It's best to be ready to spray right after stripping.