I'm helping a friend do a full tear down and clean of his El Dorado - which hasn't been thoroughly cleaned in 36 years.
The upper arch, which is mostly hidden by the top plastic, has something all over it - not exactly sure what it is. You can clearly see the difference when looking at the right edge, which was covered by wood. Any suggestions on how to clean it?
I want to be gentle with it. I've been told those arches are nickel plated. And a few years ago I tried cleaning the large upper arch for Abra Ca Dabra and ended up stripping away some of the nickel plating, which then turned black when I stuck it in Evapo-Rust.
https://pinside.com/pinball/forum/topic/gottlieb-upper-arch-and-orbit-rough-metal#post-5320630
In the bottom photo, you can see the nickel plating beginning to pull away at the bottom.
Part of me wants to throw the entire thing in the tumbler, strip off the nickel plating, sand the edges and paint it with metallic paint - which was one of the suggestions in the other post. But I'll entertain other suggestions.
El Dorado Upper Arch01 (resized).jpgEl Dorado Upper Arch02 (resized).jpg