What are the performance differences of aluminum oxide abrasive sandpaper rolls in grinding different hardness materials?

Polishing of low-hardness materials
Performance: For materials with low hardness, like wood and plastic, the aluminum oxide abrasive sandpaper rolls can get rid of surface flaws easily and give a good polishing result. Because the abrasive hardness is just right, it won't cause too much damage to the low-hardness materials. So, it can keep the material surface in good shape and looking nice.
Advantages: When polishing low-hardness materials, the aluminum oxide abrasive sandpaper rolls can create a more even grinding force. That makes the polishing process smoother and less likely to have surface problems like scratches or pits.
Polishing of medium-hardness materials
Performance: For materials of medium hardness, like copper and aluminum, the aluminum oxide abrasive sandpaper rolls can also do a great job in polishing. They can take off the oxide layer and rust on the material surface effectively and keep it smooth and flat.
Characteristics: When dealing with medium-hardness materials, you need to pick the right grit size of the aluminum oxide abrasive sandpaper rolls. That way, you can get rid of the surface flaws without wearing the material too much.
Polishing of high-hardness materials
Performance: When you're facing materials with high hardness, like steel and stainless steel, the performance of the aluminum oxide abrasive sandpaper rolls might be limited a bit. Because these materials are very hard, the aluminum oxide abrasive might wear out faster during the polishing process. That makes the polishing efficiency lower.
Challenges: When polishing high-hardness materials, the aluminum oxide abrasive sandpaper rolls have to stand stronger grinding force and friction. So, their durability might be a problem. At the same time, to get a better polishing result, you might need to choose a finer grit size or use more advanced polishing techniques.