Let me tell you, these little purple and black discs have become my secret weapon for garage restoration projects. When I first fired up my angle grinder with the purple disc to tackle a crusty old wrench, I expected a battle - but the rust practically jumped off the metal! The open mesh design is genius; no more stopping every two minutes to pick out clogged paint chips like with my old flap discs.

The dual-color system works exactly as advertised. The black discs eat through thick paint layers on my vintage toolbox like a hungry woodpecker, while the purple ones are perfect for final smoothing. Pro tip: let the disc do the work - pressing too hard just wears them out faster. I learned this after getting overzealous on a lawnmower blade (oops).

After stripping three bicycles frames and a metal gate, I'm barely through one purple disc. At $3 per disc, that's cheaper than my local hardware store's inferior options. The only surprise? My 4.5" grinder felt naked until I realized these run smaller - but now I keep both sizes handy like different grit sandpaper.

For fellow weekend warriors: these won't perform miracles on pitted antique tools, but for routine rust/paint removal? Absolute game-changers that make messy jobs almost... fun. Almost.