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

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.

Great stripping disc. Expensive but if you want to speed up your stripping project then this is the product you need.

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

Title says it all

Works great while they last, but they are very expensive given how long they last. Mostly I tested them byt removing paint and/or rust from a small amount of mild steel tubing, plate and bars.

Removes paint and mill scale without marring the underlying steel better than anything Ive ever used. Durable. Worth the price for a quality product.

The Scotch-Brite wheel is a great addition. It works excellent for taking off mill scale. Does not clog easily and does not wear too fast a great tool for cleaning metal preparing for welding or painting well worth the money.

Best option for mill scale removal from steel. Also great for surface rust removal.

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.

Got the actual disc as advertised. Works great. Given the proper selection of the correct abrasive 3m are often the best.