Rust Remover Ultra Concentrate - Makes 16 Gallons - Industrial Strength, Acid-Free, Non-Toxic - Safe for Automotive, Tools, Metal Restoration, 1-Gallon Jug

I mixed the 911 AND tap water - 16 parts water to one of 911. Immersed some rusted parts in the solution and in a relatively short amount of time (30 minutes to overnight) and the rust is GONE and once rinsed and dried I then powder coat them and the powder coating comes out great. Works best if the solution is room temperature or a little above. I think I get a fair number of parts before the solution won’t work any longer. Once it turns black it’s time to mix a new batch. Any one who follows the instructions and doesn’t get a good job is a liar or is mixing or using 911 totally WRONG. This stuff is great and it works!

Trying to get an antique car back to running condition, and the gas tank had lots of rust inside. I got rid of the old gas and washed it out as best I good, but there was still lots of rust. Since this makes enough to fill the tank, I thought I'd give it a try. The key I found is that cold water won't work. I filled it up, but after 12 hours, not much had happened. Recommendations were to warm it up a little, so I put a 500 watt halogen work light next to the tank. Once the solution warmed up, it did wonders! Two days later, the solution had turned black as coffee and I couldn't even see the bottom of the tank anymore. Once I got the solution out, all I can say is WOW! It cleaned up the rust beautifully on a 77 year old gas tank. The sender was sitting in it, and the tank was as rusty as the sender. The bottom of the sender is pretty much how well the tank cleaned up.

Removes rust as described. It WILL remove "Light Surface Rust" in 30-60 minutes, but most of the rust I'm battling takes longer. On heavy issues, I've left for quite some time, including an occasional brushing and rinsing. While removal of rust will mean some material is being removed, I have not found that the product damages the remaining surface. It doesn't even remove the paint unless there was rust between the metal and the paint already. I'm not seeing it remove 'magic marker' as a general rule. It finally gives up its rust removal qualities with time, but you can use it for multiple soakings on multiple parts. It says it can be poured down drain and it doesn't burn skin (albeit I still rinse skin if contact). If you need multiple gallons of the solution, this format is the product to use as you're not paying for the water and extra packaging/shipping. Also note that you just use the amount stated as 'adding extra' does not increase effectiveness. Just wish i had huge container to dip extra large parts. Highly recommend. Will re-order.

Rust 911 is inexpensive, safe to use, and kills rust, as claimed. It does NOT remove paint, primer, or body filler, but the manufacturer never claimed it does so. The parts to be derusted must be thoroughly stripped of paint before treatment with Rust 911, which can be a lot of work with today's wimpy paint stripper liquids. After treatment, the rust is transformed to a black film that must be brushed from the metal; I've found scrubbing with a stainless steel toothbrush works well. To loosen the film in hidden areas, like behind brackets, I pour a tablespoonful of steel BBs into the hidden area, tape off the holes, and vigorously shake the part. Then I remove the tape, pour out the BBs, and dunk the part back into the Rust 911 to flush the loosened particles. Several repeats of this procedure does a pretty good job removing rust from the hidden areas - slick! Even the non-rusted areas of the metal will have dark stains after treatment with Rust 911; they must also be scrubbed or sanded off. Then I rinse the metal with clear water and wipe it with phosphoric acid (metal prep) to prevent re-rusting. I also noticed if the part to be derusted is too big to be completely submerged, Rust 911 will etch a shallow groove into the part right at the waterline, which was a bit of a surprise. Overall, a good tool, but not magic.

I wish that I'd taken before pictures, but this product did a very good job of removing rust from several moderately rusted items that just barely fit into a 4 gallon rectangular tub. I only used 16 oz of the concentrate mixed with two gallons of water and then flipped the sides that were not submerged over after about an hour. Worked really well on the cast-iron heavy AC compressor bracket and brake pedal, and still quite good but not as great on the brake pedal bracket, made from thinner stamped steel that likely had some coating. Better results and much more cost-effective than Evaporust. I did hit all of the parts with a brass brush drill attachment first in order to not waste the chemical on stuff that could easily be removed mechanically. Very effective product that I'll buy again when I run out.

I love this stuff. It's as effective as the much more expensive chelation products. One warning: If you've never used this before, be careful if you need to de-rust cast iron. This solution will start to disolve the iron if it's left in too long, leaving tiny pock marks all over it. - So check every 5 minutes or so. Be man, does it ever work!

Buy this, follow the directions and be amazed. The trick to long life of mixed solution is the clean with degreaser and wire brush the rust before soaking.

The bottom shelf of my steel (tested with a magnet) medicine cabinet had rusted badly, so I ground out as much of the rust as I could and attempted to use Rust911 to deal with the bits I couldn't get at with my grinder. I built a dam to contain the solution, mixed it up according to the directions, poured it in, and waited for two days, after which I swabbed up the liquid with rags. The result: nothing. The rust was still there, essentially unchanged (maybe a little worse after 48 hours underwater). The Rust911 has no odor, no color, no perceptible texture—I'm left with the uneasy feeling that I paid $45 for a little jug of water. UPDATE: I tried this product again, this time on some rusted steel hinges. In the photo you can see the result of soaking for FIVE days in properly-mixed Rust911. The orange smears on the paper towel are (spoiler alert!) rust. Learn from my mistake and don't waste your $$$ on this bogus crap!