Scotch-Brite Clean and Strip XT Pro Disc - Rust and Paint Stripping Disc - 4.5” diam. x 5/8-11 Quick Change Thread - Extra Coarse Silicon Carbide - Pack of 1

Decent at removing hot rolled millscale when new but gets very hard to use and requires a lot of pressure once it starts to wear, I just used an Aluminum Oxide grinding wheel to get the millscale off and a flap disc to smooth it out. Faster and cheaper even though you’re going over it twice. These weren’t worth the money for me. Three stars since they did work well when they worked and left a beautiful finish.

Did not hold up as well as I hoped. Bought to strip mill scale on some plate steel. May work on lighter mill scale, but didn’t hardly touch mill scale on 3/4 plate.

They advertise it will take millscale off quickly Well it took it off the front half of this 14 inch x 10 inch piece of metal, disc is 3/4 gone and has stopped working Garbage for over 20 bucks a disc, side note this same disc is $11 at local stores dont buy it from here

Best I found so far to clean metal before tig welding. Cleans mill scale and rust without cloggin. Doesnt last very long but I will buy more when needed.

Bought 2 of these to strip mill scale off large sheets of steel. Would work reasonably well for maybe 1-2 square feet and then got progressively less effective. Found pad was fouled by the material removed. Took steel file and removed the junk which revitalized the pad for a while but was a losing battle. Finally threw in the towel and used muratic acid to finish the job. Did find pad was very effective at removing resulting surface rust which appears once acid is washed off and panel dried. So it has a use but not as effective as the description made it sound.

The product performed better than listed.

I was skeptical that a scotch Brite, grinding disc could remove thick mill scale off of plate steel. After applying acid to the mill scale, this scotch Brite wheel is the only thing that would remove the metal scale without putting serious gouges in the plate.

Ok so these are ludicrous overpriced but I decided to give them a shot after reading that they last a long time. Performance on steel is top notch. Tore right through light rust and mill scale almost effortlessly, leaving a surface that is ready to weld. Durability- I got maybe 30 minutes out of one pad. That doesnt seem THAT bad until you consider that these are $15 a pop. Im sold on the concept but not this particular product at this price point. Going to try some cheaper options under $10.

These disks are very good at removing the paint and leaving the metal below in good condition

Had a project I was working on over a year. By the time I completed it there was some rust on my welds as well as the steel plate, with this I was able to quickly remove all rust and get it down to a level I could paint without leaving any deep scratch marks.