My 84 Z28
05-01-2017, 05:57 PM
#102
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Car: '84 Z
Engine: L69
Transmission: T5
Axle/Gears: 3.73
Re: My 84 Z28
https://www.thirdgen.org/forums/body...face-rust.html
Turned out well. Did variations of 2 part epoxy or gray POR15. Toughest part was cleaning rust from pits for 2 part epoxy areas. Treated them with phosphoric acid, wire brushed, treated again. Never could get the deep pits perfectly clean where the acid no longer reacted deep in each one. But those pits will now get blasted with spot blaster during the new paint phase.
The single stage in a spray can was OK to work with if did very thin coats. They don't cover well, and takes many to cover either the POR15 or epoxy.
But I felt all was successful. It did stop further rust.
You could give it a try if your paint is stable. Otherwise you'll start at a rust area and as you clean the surface the surrounding paint may continue to come off. Possibly a Van Nuys issue.
I think important thing is stop the rust before it gets any worse.
If you use POR15, don't brush/clean the surface too much because it doesn't stick to smooth metal surfaces. Leave some of the pits and surface brown for something to bite on to. Experiment in the least obvious places first, or on underside somewhere. Takes time to get techniques figured out. But I'm also a newb.
Turned out well. Did variations of 2 part epoxy or gray POR15. Toughest part was cleaning rust from pits for 2 part epoxy areas. Treated them with phosphoric acid, wire brushed, treated again. Never could get the deep pits perfectly clean where the acid no longer reacted deep in each one. But those pits will now get blasted with spot blaster during the new paint phase.
The single stage in a spray can was OK to work with if did very thin coats. They don't cover well, and takes many to cover either the POR15 or epoxy.
But I felt all was successful. It did stop further rust.
You could give it a try if your paint is stable. Otherwise you'll start at a rust area and as you clean the surface the surrounding paint may continue to come off. Possibly a Van Nuys issue.
I think important thing is stop the rust before it gets any worse.
If you use POR15, don't brush/clean the surface too much because it doesn't stick to smooth metal surfaces. Leave some of the pits and surface brown for something to bite on to. Experiment in the least obvious places first, or on underside somewhere. Takes time to get techniques figured out. But I'm also a newb.
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