Seems a nice way to treat the sheet metal on my truck wreck. On the other hand, it seems a bit too easy / too good to be true. Any experience? And how should the sheet metal be treated after this? Special primer before paint, or just regular?
I've used a few similar products (but not this exact one) and they do work. They work really well and quick on fresh rust that isn't deep but can work on crustier stuff if worked in and kept wet with product.
I have found that these work best on small parts that you can soak as they seem to evaporate before they are finished working so you often need to keep re-applying. Small hardware, nut and bolts can clean up very well using some of these products.
I'm not a fan of the coatings left behind with some products and usually want to remove it to see bare metal. It's hard to tell if the coating is hiding some rust it hasn't removed or if the coating may react with a top coat.
My first thought on the video is how nice the parts would clean up if removed and media blasted. Blasting would have been just as fast but more thorough and less chance of missing some rust.
1938 Canadian Pontiac Business Coupe (aka a 1938 Chevy Coupe with Pontiac shaped front sheet metal - almost all Chevy!) 1975 4-speed L82 Vette
There are basically two chemical processes to remove rust. Acids and chelants.
Typically for non-industrial applications weak acids are typically used, acetic, citric are the organic acids and phosphoric mineral acid. Various additives are sometimes incorporated in products to reduce evaporation, base metal attack and leave a protective coating (to retard rust formation). There are a wide range of companies that produce metal treating products. Most paint companies as well as smaller specialty automotive product sellers offer them. Remember Naval Jelly?
Chelants are much more expensive so generally not to widely used in aftermarket products. I have used some in the past and they do a reasonable job but don't leave a protective coating so re-rusting can be an issue.
There are several industrial cleaning companies that use stronger acids and chelants to cleanse large equipment in refineries, chemical plants, power plants, etc. They have the technology and expertise. Most of the products available to us come from that technology.
I've had real good success with POR15. It really is permanent if you use it per the directions. Oh, and if you get it on your hands, "foget-a-bout-it! It ain't coming off. Don't breathe the fumes either.
Rick
"Never time to do it right the first time, but always time to do it over."
