3M Scotch-Brite Clean and Strip XT Pro Disc, XO-DC, SiC Extra Coarse, T27, 4-1/2 in x 5/8"-11, Silicon Carbide Cuts Aggressively and Leaves a Fine Finish, Resists Loading, Purple

This is an awesome product for ripping paint off metal. It wears away with use so don’t expect it to last forever. Used carefully it lasts long enough to justify the cost.

Pricey but they last

These purple silicon carbide discs absolutely eat mill scale. I used it today fit the first time but it removed rusty mill scale nearly instantly and showed no signs of loading up. Any other disc, sander or abrasive would have been glossing over the surface by the time I finished what I did today. I'm teaching myself to weld, these were a great find. I'll still use vinegar for longer prep times, but these are a great alternative that gives instant results. For stripping steel to a clean surface I definitely recommend these.

Did quick job removing scale on hot rolled steel square tubing.

Quite pricey compared to no name brands, clogged up way too soon. A cheaper alternative that you get a multi-pack would suit everyone who does any serious paint removal.

Works excellent

Rips off Mill scale very quickly without too much affect to the base metal, exactly what I needed to clean off a 20x30 plate of steel for a griddle I'm fabricating.

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.

Costoso ma qualitativamente ottimo

Thread mount stripped very very quickly

Funciona a la perfección para quitar óxido y pintura así como algo de salpicaduras por soldadura, da brillo y pule el metal, eso sí, no se debe ocupar en las orillas con filó porque se desgasta muy rápido, de ahí en fuera es muy buen producto, lo compraré más adelante de nuevo!!

perfect

Works like a champ to remove rust, mill scale and paint.