some people do this because they don't know how to pronciate the sentence
I decided to use coarse sandpaper to smooth out the rough edges of the wooden table.
Example sentence(s) - The salt is coarse ground. She has long, coarse hair.
That is a coarse piece of sandpaper! His coarse behavior will not be tolerated.
It depends on where you put it in a sentence. Of coarse in the beginning of a sentence you capitalize space but by it's self no you don't capitalize.
Burlap is a coarse cloth.
Sandpaper is coarse.
The coarse sand was hard on our feet
My dress was made out of coarse material.
Example sentence - We prefer the coarse ground pepper over the fine ground pepper.
The sandpaper had a coarse texture, making it ideal for removing tough stains.
The horse took a course through the coarse terrain.
The grasses were also becoming quite coarse with a loss of small flowering plants.