The choice of grit size depends on the specific grinding task. Generally, for removing thick old paint layers or rust, you should choose coarse Dry Sandpaper, such as 60 or 80 grit. For wet grinding processes, like fine grinding the ship's surface before painting, you can select medium-grit Water Sandpaper, such as 180 or 240 grit. When using Membrane Sandpaper for fine grinding on complex shapes, it's common to choose finer grits, like 320 or 400 grit, to achieve a smoother surface.

Use coarse grit (e.g., 60) for coarse grinding, medium grit (e.g., 180) for wet grinding, and fine grit (e.g., 320) for fine grinding.

Dry Sandpaper can be used several times, while Water Sandpaper and Membrane Sandpaper, being more durable, can be used multiple times.

Niumaterial recommend opting for Western Union, as it offers a more favorable handling fee. However, for new clients, we currently only accept payments through 50% T/T. On the other hand, if you have been a long-standing customer and are experiencing financial constraints, Niumaterial offer the option of OA credit.

It depends on whether you need to customize, if you don't need to customize, Niumaterial can ship within 7 days if we have stock, if you don't have stock and need to customize, it will take 7~15 days!
After delivery, you will generally receive the goods in about 45 days, but the specific time you receive the goods depends on your port, shipping date, customs clearance time and other factors.

Technical Support: Niumaterial team of experts is ready to help you diagnose and resolve any technical issues or challenges you may encounter;
Customer Support: Niumaterial can provide product guidance and advice as well as order tracking and delivery updates according to your specific requirements, ensuring a smooth and hassle-free process from purchase to receipt.