3吋×6英尺 3M 361F AO砂布

Cut a piece off for some rough rust removal and it held up way better than the sandpaper rolls I usually use—no tearing after several minutes of work. It's stiff but flexible enough to get into curved spots. Exactly what I needed for heavy duty prep.

The 80Y grit is aggressive yet leaves a surprisingly smooth finish, and the 6-foot length lets me work on long pieces without stopping constantly.

Cut through old paint and rust surprisingly fast on my bench grinder, and the cloth backing held up without fraying through a full 6-foot strip. The 80 grit is aggressive enough for heavy material removal but didn't load up with debris like cheaper belts I've tried.