In this task the focus is on physical knowledge about the world. Given the provided goal task in the input, describe a process that would lead to the asked outcome. This process often involves physical motions with objects, such as moving them, arranging them in a certain way, mixing them, shaking them, etc. 

To etch a design into a glass jar
Using a clean jar place your stencil sticky side down on the jar. Use tape to cover up the spots you don't want to be etched around the stencil. Brush etching cream onto the surface of the jar around the stencil and let sit for 3 to 5 minutes. Wash off.

is it okay to eat baking chocolate with a white film?
yes, it's only chocolate bloom. microwave to redistribute.

How to thicken barbecue sauce.

Pour sauce into mason jar and place in refrigerator.