Well that's a lot cheaper than the "d-rust-it". I ordered a gallon of concentrate for $59.50. Supposedly you can mix it (10:1) but used it un-diluted. I soaked a cast iron water outlet and housing in the solution overnight, actually for 24 hours. To prep it before going into the d-rust-it, I had scrapped all of the loose rust from the inside that I could with a screwdriver, on the bench grinder, wire brushed all I could get at with a 6” wheel, and soaked/scrubbed them with detergent. After 24 hours it was pretty much free of rust but had a real bad black smut that I scrubbed on for a half hour with a wire brush. I had black crap all over everything, the sink, the buckets my hands. I think the cleanup of the black stuff was worse than just wire brushing it or sandblasting it. Again, it took a lot of time to clean up, this you don’t have with the other two. In the end, no matter which method you use, in the hard to reach places, you either have some rust left on the inside that you can’t clean up or some black sooty smut that you can’t get at to clean up.
Denny Graham
Sandwich, IL
