For hand polishing of stainless steel bends, the tool is actually an angle grinder with a triangular belt holder, or a double wheel holder.
This combination is particularly suitable for such cases where space is tight and there is an obstruction next to it.
To do this use a belt that goes from coarse to fine grit and sand first to remove weld scars and oxidized skin.
The grits of the coarse sanding are relatively coarse, and the sanded product has deep scratches, so it needs to be finely sanded with a fine grit sanding belt to smooth the surface.
Smooth the surface and use nylon sanding belt to remove scratches.
Wide sanding belt to sand the outer circle, narrow sanding belt to sand the inner circle, because the curvature of the inner circle is not suitable for too wide sanding belt to contact with the point surface, the narrow sanding belt can be very good.
Narrow sanding belts can be very good to make the sanding surface completely with the sanding belt contact, so it is very important to predict the inner circle of the sanding belt in the selection of the appropriate sanding belt.