The problem is, there is no data sheet. Wanting to use this chip, [David] turned to sandpaper to figure out the pinout of this chip. The best example of a product that came with this chip is a ...

resulting in a surface that's smooth to the touch and without visible scratches. How a sandpaper grit works on a material will drastically differ based on the type of sander you're using.

For small batches or one-off parts, we might reach for a few pieces of sandpaper to smooth out these rough edges. While that might work for a small number of parts, it’s not always the best or ...