Hi All,
This hood was media blasted, then sanded with 80g, then sprayed with Ospho and wiped with red scuff pad. Then it soaked at least 30 min. Then soaked with Ospho again for min 10 min, then rubbed down with water and red scuff pad. I did my best to keep it wet before and during rinsing with water and wiping with scuff pad and water. Then dried with air gun. Now I'm doing final sanding with 80 grit for epoxy. Based on what I've read, the small rust pits remaining are treated and should be fine under the epoxy. There was/is a dark gray coating on the metal that I've removed most of but some still remains.
How do I know if the Ospho is neutralized? What is that dark gray coating? Thanks all for any advice.
This hood was media blasted, then sanded with 80g, then sprayed with Ospho and wiped with red scuff pad. Then it soaked at least 30 min. Then soaked with Ospho again for min 10 min, then rubbed down with water and red scuff pad. I did my best to keep it wet before and during rinsing with water and wiping with scuff pad and water. Then dried with air gun. Now I'm doing final sanding with 80 grit for epoxy. Based on what I've read, the small rust pits remaining are treated and should be fine under the epoxy. There was/is a dark gray coating on the metal that I've removed most of but some still remains.
How do I know if the Ospho is neutralized? What is that dark gray coating? Thanks all for any advice.