Hi Kim, here's a link that describes how to make it
Hi Kim: Here are some sites that may help:
You don't want to add sand to paint for walls. Will look awful and ruin your walls. The suede techniques from Betsy look good.
This video may be helpful: https://www.youtube.com/watch?v=1AB9EvmvUQU
I wouldn't take a chance...if the homemade mixture separates you will have a permanent mess. I would buy it instead.