12-Pack 4-1/2" Paint Stripper Discs for Angle Grinder - Heavy Duty Rust & Paint Removal Wheels for Metal, Wood & Concrete - Perfect for DIY Projects, Auto Restoration & Home Renovation

Reviewing: WelderElite 4" x 5/8" Grinding Discs for Angle Grinder Rust Paint Stripping Wheels, Metal & Wood Surface Cleaner-Black Between restorations, modifications and custom fabrications, I do a lot of metal work. I've used stripper discs ever since they came out with them because of how effective and efficient they are at cleaning any metal surface down to bare metal. Rust, paint, even epoxy is gone in seconds. I can't imagine ever going back to wire wheels (although I still use wire wheels to get into tight corners). A few pro-tips for using these discs:• Work from the center of a surface out to the edges - going from the edges in will wear these down much faster.• Let the tool do the work - use only a little pressure. The work will go faster, and the discs will last longer.• Don't try to get into tight corners with these discs - you'll only end up overheating them and leaving melted polymer swirls on top of the corner you didn't get clean, and (you guessed it) burn through the discs faster than necessary. I've been trying to figure out the different grits associated with the different colors, but I haven't found any definitive answers so it may be that the color and grit are not always related. That being said, these black discs do seem to be a bit softer material than the blue and purple ones I usually use.I hope this helps!