The last time I painted my SV was in the 1980’s, which I’m pretty sure is before the invention of self-etching primer. If it was around then, I didn’t know about it. I learned everything I knew from reading DIY books and used a phosphoric acid solution to etch bare metal before priming. I don't know if anyone does that since the invention of self-etching primer, but need to prime the trunk lid for my SIV and am thinking it might be worth a phosphoric acid wash first.
The SIV is protected with epoxy primer but the lid came from a different car. I don't remember which one, but I had it dipped about 10 years ago to be sure it was rust-free, but it was left un-primed all this time. (Not by me, but that is a different and longer story.) The lid has been sitting on the boot and the underside still looks nearly perfect. The car has always been garaged but the top of the trunk lid had a light coating of surface rust. I’ve removed that now but there are some pits here and there (probably from before the dipping) and I want to be certain there is nothing lurking inside those pits that would come back to haunt me.
I have a gallon of this sitting around: https://www.amazon.com/Klean-Strip-GKPA30220-Gallon-Phosphoric/dp/B00945D15I, so that is one option. Is there any reason not to wash the surface with a diluted solution before priming? Alternatively, I have had good success with Rust-Oleum Rust Reformer as a general purpose primer (https://www.rustoleum.com/product-c...o/removers-and-chemicals/rust-reformer-spray/) but don't know how it would do under auto paint. I was thinking about a light coat of the rust reformer, followed by a general purpose auto primer. Any thoughts on that as an option?
Thanks. I am still a ways away from starting work on the SIV, but at least want to protect the trunk lid, especially given how close I live to salt water.
The SIV is protected with epoxy primer but the lid came from a different car. I don't remember which one, but I had it dipped about 10 years ago to be sure it was rust-free, but it was left un-primed all this time. (Not by me, but that is a different and longer story.) The lid has been sitting on the boot and the underside still looks nearly perfect. The car has always been garaged but the top of the trunk lid had a light coating of surface rust. I’ve removed that now but there are some pits here and there (probably from before the dipping) and I want to be certain there is nothing lurking inside those pits that would come back to haunt me.
I have a gallon of this sitting around: https://www.amazon.com/Klean-Strip-GKPA30220-Gallon-Phosphoric/dp/B00945D15I, so that is one option. Is there any reason not to wash the surface with a diluted solution before priming? Alternatively, I have had good success with Rust-Oleum Rust Reformer as a general purpose primer (https://www.rustoleum.com/product-c...o/removers-and-chemicals/rust-reformer-spray/) but don't know how it would do under auto paint. I was thinking about a light coat of the rust reformer, followed by a general purpose auto primer. Any thoughts on that as an option?
Thanks. I am still a ways away from starting work on the SIV, but at least want to protect the trunk lid, especially given how close I live to salt water.