RRRR! Rusty Trunk Lid--What to do? Options

[bkrantz]

As shown on my build thread, I am working on the rear of the body, including the trunk lid. This is a donor lid I got last year to replace the rusty original.

Now with the work I was doing to straighten the new lid edge, I found rust where I thought was clean--should have known better.

[bbrock]

Can't speak to getting the foam out but I think phosphoric acid (e.g. Ospho) does a very good job treat the rust and can seep into crimps and crevices nicely. After rinsing the Ospho with water and drying it with a heat gun, I followed with Eastwood Internal Frame Coating add protection. After all that, I looked inside with a boroscope and liked what I saw. After I painted, I followed up treating all the cavities with 3M Cavity Wax Plus. I might have gone overboard but really like cavity wax and figured I'd provide as much protection as possible. Car hasn't been on the road yet though so can't say how long it will last.