Krud KutterMR32 The Must For Rust, 32-Ounce Trigger Spray

I bought this to clean two steel hollow rods used on a radio antenna system. The Antenna was bought second hand and while 90% of it was aluminum those two 10 ft rods were steel and had been left outdoors on the ground for 5 years. Yep they were completely rusted and flaking.Taking them out to the driveway I wire brushed off all the flaking rust and then applied the Krud Kutter. The problem with doing large parts is that you cannot soak them in a container so you have to just spray them then let it sit for 30 minutes and then spray them again because the Krud Kutter will dry out. After 4 applications with an in between wash after the first two and then a final hosing off I had clocked about three hours working on them.The end result was at first a mixed bag of very clean shiny galvanized metal and patchy areas of darkened metal.On closer examination I realized it was not rust but just a left over stains that might come out with more soaking time. I decided instead to just use some 250 grit sand paper and rub it down lightly for 5 minutes. The once completely rusted surface was now 90% smooth and was left with just some small 1mm round pock marks on 10% of the surface from deep rust penetration.After cleaning off the rods with pure Alcohol I quickly sprayed the surface with cold Zinc spray. You really need to put something on the surface fast because if you leave exposed you can see a light powdery rust layer forming within minutes.After the cold zinc was sprayed and it dried I was shocked that I could clearly see the part numbers stamped into the metal, they looked as clear as if it was new! These were not even remotely visible before the treatment and I am pretty sure if I had used a hard sander they would have been rubbed out along with a lot of the surface steel. After giving the cold Zinc 48 hours to cure I used an epoxy paint that would hold to the cold Zinc Primer. The end result was almost a factory look as the paint filled out any tiny pits that were remaining.I am very happy with this product, it does what it says it will do and is better than any rust removal chemical I have used before. It does not eat at the metal, only the rust.

This stuff is pretty awesome (if used properly)! it literally dissolves away rust. It may take a few applications of this spray along with some scrubbing and washing but it does definitely work.The problem: If many people are anything like my roommates, they assume that this spray is just magic and will make a super rusted old car look brand new. It's not magic. That doesn't mean that you can't remove a lot of rust from something, It just removes rust little by little over a period of time and possibly several applications.So far I've used this stuff to de-rust some of my car parts (just spraying it under my car every 15-20 minutes several times), bike parts, metal light switch covers, tools and as shown in the photos attached, some cabinet hinges, shower head and other metal parts in my bathrooms (and many other metal parts).Unfortunately I didn't take before and after photos of everything I've de-rusted but these hinges and the shower head only got a single application and this is what they looked like ~15-20 minutes later. Like I said, it definitely works.If you've got something that's VERY rusted, you might want to get the gallon container of this and put it in a bucket (along with your rusted part) to let it soak. I've also dumped it into my ultrasonic cleaner and that works REALLY well. Removes every bit of rust. If you can't submerge the part, then just give it several applications of this stuff, keeping the part wet for the most part. And then scrub and clean it in between to see its progress.I should also mention that I've now gone through at least 5 different "rust-removing" agents and none of them (besides straight up acid [which is dangerous]) have done as good a job as this stuff.Only downside is probably the smell. Spray it in a well-ventilated area if possible and after you remove the rust, rinse it, try it with a towel, give it an hour to dry the rest of the way and then coat it in something like "Sta-Bil rust prevention spray or something (if possible) to keep it from getting rusty again.Bottom line: It's my new favorite rust removing chemical! Love this stuff :)

My rotors and calibers started rusting a few weeks ago. I sprayed this directly on the rotors and calibers (while the wheels are still on my car). I sprayed it in the morning, went in to work for 8 hrs and when I left work most of the rush was gone, there was white residue left but I'm sure that will rinse off when I spray it down with a hose. No white residue on my rims/wheels though which is impressive. I'm guessing the white residue is what's caused when the rust is broken down. Since the rotors rotate with the wheels, When I drove again I was able to spray the bottom half of the rotor (cause now they're on top if that makes sense.lol). Anyway now all the rust is gone.

The notion of spraying this liquid on something to de-rust it is largely ludicrous. It is so watery it won't actually cover the item as a thin film, but rather forms little droplets of de-rusting chemical, so those little circles where the drops are will benefit, but the rest of the item will get no treatment. I found the only realistic way to use this is to pour it into another container and immerse the item to be de-rusted in that.This doesn't work super fast, & I find 10 minutes at a minimum are needed. After that, you'll need to buff off the light coating of dark oxide that remains on the de-rusted item (I use a finishing pad. You'll then have a nice, shiny, de-rusted item.This product is made by Rust-oleum, & they have another product that squirts out as a gel and that is REALLY good at staying put and de-rusting. You can even trowel it around with something, spreading it where you want it in case the spray wasn't uniform.