Review on 🧼 Pumice Cleaning Stone with Handle: A Multi-purpose Solution for Hard Water Ring Removal - Ideal for Toilet Bowl, Bath, Pool, Kitchen, and Household Cleaning (4 Pack) by Angel Harris

As with knife sharpening stones, do yourself a favor and follow the directions. The key to using knife sharpening stones or sandpaper is to let the hard abrasive do the work. More pressure won't make it faster, but the stone will wear out faster and possibly crack. It's better to make more passes and avoid heavy pressure. The mind is trying to tell you that more pressure is needed. but it's not really better to cut a spot with a lot of pressure. People often wear out sandpaper quickly by using too much force, as is often the case with expensive sharpening stones. That is the same. Select a stain and apply light to medium pressure until the stain begins to lift. Heavy pressure wears down the stone just like your hand does. Almost all abrasives are like that. The high pressure also packs the removed material between the grains of the stone, making it less abrasive.