I have a pair of Rock Krawler 12" travel 2.0" remote reservoir coilovers for sale. I ran these for 9 months before switching to a set of Rock Krawler 2.625" remote reservoir coilovers.
To prep them for sale, I asked Rock Krawler to rebuild them. They were rebuilt in September of this year and have not been used since. As can be seen in the pics below, the coils have some rust on them, but the coils are structurally sound; the rust is nothing some minor sandblasting and painting couldn't fix. Or a new set of coils could be put on them to essentially turn them into brand new coilovers.