FDC Rust Converter Ultra, Highly Effective Professional Grade Rust Repair Spray (1 Gallon)

I used this on an old car body that was glass bead blasted and it worked great for me. I applied it uncut with an undercoating gun. It went on pretty good considering the cheap gun I bought because I couldn’t find my old good one. On the inside, it went into places that blasting couldn’t get. It turned purple, and after 4 days, I sprayed epoxy primer over everything and it adhered well. I live in Arizona where the humidity is very low, so consider your humidity levels, you don’t want to trap moisture between your metal and this stuff. This stuff is good for existing rust, not so much for preventing rust from trapped moisture, or your finger prints.

My 2014 Tacoma was developing some rust spots underneath, so I tried this rust converter. It worked amazing well! It looks like milk and does not have any nasty odor. I simply brushed it liberally on the rusty spots on the undercarriage, and within a day or two I noticed the rust was gone. No scraping or sanding required. I also did not bother painting over it afterward as the rust was all surface level and this really took care of it. Unfortunately, I only used about 1 quart of the stuff so I have a ton left over... if it came in a smaller container option that would be great. But still, for the price it worked great and took care of the problem, so I highly recommend.

I recently bought the Rust Converter to use on the roof of my 2005 Toyota 4Runner. Years of roof loads had left scratches all over the roof that subsequently rusted. I was dreading the thought of sanding the roof to remove the rust. I was actually looking for a metal treatment product to put on the roof after I sanded when I found the rust converter. I followed directions and lightly sanded the roof to remove high spots and generally smooth the roof for painting. I applied the solution with a brush, waited for several hours and gave it a second coat. The rust converter worked as advertised and turned all the rust spots to a dark black color. I am ready to paint and extremely pleased that this product took my prep time down from 5 or 6 hours to less than 2. The only comment I will make to first time buyers is that -- a little goes a long way. Not wanting to run short I ordered the gallon size. After applying two coats and touching up some other areas around the house, I found I used a little over a pint. So gauge you needs by that. I am a USCG Captain and can see the value of using this product a thousand places on my boat. It is a great product and I will buy it again. Tom -- Charleston SC

Performed well on the underbody of my truck. Followed directions and got results promised. Stopping rust before it gets out of control.

Useed some today and it seems very good.

Wear rubber/nitrile gloves, you'll need them. Having a fine nap paint pad may be handy if you don't have tons of gloves. Product is thin and coverage is excellent. Thin yet somehow viscous enough to not drip a lot. Applied with brush on rusty OME leaf springs. Everywhere that factory finished remained it turns whitish. (Manufacturer recommended using oil based finish to protect once product cures in 48 hours) like any job, prep is key. your mileage may vary. Everywhere there is rust or bare metal turns a dark purple/midnight within 30 minutes. It foams a lot so wouldn't recommend using an air sprayer. The cleaning type sprayer (Windex bottle) would be good on "stream" for covering large areas of truck frame or large projects. When foaming occurs in project material; sampling rub with gloves hand or use fine napped paint pad or microfiber cloth. Used about 4 oz. to cover all leaf springs twice over. Next morning product seems cured with no off-gassing. Time will tell longevity. I tested rusty bolts, a shovel, some plate steel. Un cleaned truck frame, product was not picky ... Works on just about everything. Much easier, cleaner, better coverage and adherent, non-fuming alternative to POR15

I'm not much for leaving reviews but it's so rare to find a product that actually does what is supposed to I use this on a 77 Cutlass frame I'm restoring and it worked perfectly I will probably buy this product again for other hobbies that I'm working on I can't say how long it would last but I applied it in 40° weather and it dried fine now I'm going to blow a coat of epoxy primer over it then do the Finish paint

This product does not work within 1 week it's all brown and rusty again and no matter how long you shake it it has chunks in it if you want to paint it you'll have to go back over it again with solvent to get all the chunks of crap out of it and off the metal

This is my second time buying this now. With the last jug I rust converted the frame on my truck and the frame on my friends 20 ft trailer. It worked great. I'm hoping it kills the rust so that my frames last a lot longer. My second jug is for the second truck I'm fixing up.

it was eating through the paint even after letting it set for three days.

I give it a 4.5. Would be higher if not for the shelf life of the product. Initial supply chain glitch resolved with Paul. Converter works great if used according to instructions on the container ( jug). I did 2 coats 30 min. to an hour apart then a third coat the second day. Turns the rust, metal a dark purple, black colour then after the third dries to almost black. Just be sure to get the loose rust, flakes off (wire brush) before applying. One or two coats of paint and my truck frame looks new. Just be aware, product has a shelf life.

Work great!

Great value for the money and it does exactly what it says on the tin. I will definitely buy this again.