Question about Ospho, epoxy primer, deep rust
Sep 9, 2022 · My understanding is that Ospho will convert surface rust, but if the rust layer isn't very superficial, I would assume that under the ospho treatment there is still deep rust. Is that …
How do I apply OSPHO, Remove & Neutralize on My Under Floor
Nov 21, 2023 · Meaning after you have treated it with Ospho which will take a while to get all the surface rust off and etch a tooth into the metal. Re-wet it with Ospho and keep it wet with …
How to neutralize Ospho - Southern Polyurethanes Forum
May 15, 2015 · Ospho, is a great product for automotive if used right, we give scare warnings because we want people to call so we can make sure they know how to neutralize it, so no …
How to know if Ospho is Neutralized - Southern Polyurethanes …
Dec 5, 2023 · Flash rust is OK. Stuff that happens in the moments after treating it with Ospho then rinsing. If you have any black pits of rust, you need to remove them or it will fail in that spot. …
SPI epoxy primer after panel treated with phosphoric acid
Nov 16, 2020 · Clean with SPI #700 and let dry before primer. Thanks for the info. but the panel is already treated with their version of rust converter which has phosphoric acid in it. So what you …
I think I know the answer, but I am going to ask anyway!
Aug 1, 2016 · The makers of Por 15 think that the metal is prepped when the rust is covered with their product, but most of the people here think the metal is prepped when it is rust free and …
using denatured alcohol vs soapy water for ospho neutralization
Sep 8, 2024 · The minerals in your water cause it. Rinsing the ospho with distilled water helps some, but the flash "rust" won't hurt a thing, anyway. Rinse it, dry it, and epoxy it.
Why is ospho the only recommended rust converter
Jul 18, 2025 · Any phosphoric acid product marketed for removing rust from metal or etching concrete will neutralize the same way. As Don said above Barry's reluctance to endorse others …
Excessive flash rust after ospho neutralization | Southern ...
Feb 9, 2024 · I recently got my 76 Datsun sandblasted and due to metal quality I opted to Ospho the surface prior to using ŚPI epoxy primer (in retrospect a bad decision after speaking with …
Ospho removal - Southern Polyurethanes Forum
Aug 23, 2015 · Anybody know what affect Ospho, and the water to rinse it would have on filler that was applied direct to metal. Long project has developed a lot of surface rust. Generally …