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

Pricey, but well worth it for removing paint.

These work better than anything else Ive found to remove mill scale from steel.

As advertised, last longer than expected.

Works well

la use para limpiar unas ollas que tenían capas de grasa quemada, primero quite un poco de grasa quemada con gabon y con una carda de alambres delgados, después pase esta carda de fibra y quedaron como nuevas

These are the best and fastest rust removal disks I have ever used. I have two Delta woodworking machines with cast iron tops - they had been in storage for 7 years and the East Coast humidity had put a pretty heavy layer of surface rust on them. I figured I would have to remove the tops and send them to a machine shop for precision surface grinding or milling. I saw these 3M discs on Amazon and thought what the heck what have I got to lose. I reviewed some YouTube videos demos on using these disks then moved my machines outdoors put on my mask and eye protection and went to work on the tops. Wow! Was I surprised how fast the cast iron was stripped of the rust. They shine like almost new. The secret to success is as follows. Keep very light pressure on the disk and constant movement overlapping passes. Better to make many light passes letting the disk abrasives do the work. If you follow these guide lines you will have a very shiny rust free surface that looks almost milled like with no gouges or unevenness. Do not be tempted to bear down or work heavier rust scale areas to get quick results as you will gouge and create hollows on the precision surface. Just keep moving and overlapping in many passes with light pressure - you will see disk doing the work. It does not take long at all to get perfect results. I went back over the surfaces with medium and fine cloth backed emery paper on a sanding block to polish the surface. Cleaned the entire surface with rubbing alcohol - let dry completely and then applied two coats of Johnson’s floor wax. My machine to table tops shine and allow wood to glide over a perfect surface. This was all accomplished without having to remove heavy cast iron tops or expensive machining. Highly recommend these abrasive disks for rust removal.

Used these to remove mill scale on sheet metal. They didn’t last as long as I thought they would.

I especially like that it sticks a bit out from the grinders protective shield, allowing to put it down horizontally. Pretty aggressive on wood though, need to touch down very gently.

Crazy effective for removing mill scale. Concerned about longevity. We shall see.

It works wonderfully. However, the lifespan is incredibly short, especially for the cost. I would happily spend $3-4 on this product, again and again. It just doesnt last anywhere near long enough to justify the price tag of over $18.