Q.what is cheesecloth
What is cheesecloth and what is it used for?

Cheese cloth is a loose weave fabric. It can be used as a shade cloth in the garden or a straining cloth for making compost teas...as well as many other uses!
It can be purchase in fabric stores and many hardware stores sell it. It can be used to clean up surfaces prior to painting and staining.
It is quite inexpensive.
https://www.gardeningknowhow.com/plant-problems/environmental/sunscald-on-plants.htm