First, you need have a plan. Make sure where you want it to be in rhinestones and how it will look like. That will save you much time to avoid peeling it off and re-sticking it.
Then, you should properly clean and wash your car. No dust can make rhinestones stay there more firmly and longer.
Next, you tear the stickers and put them on your car as your plan in your mind.
*before you stick it, pls make sure your car is totally dry. Water will damage the glue back of rhinestones.
*avoid the exhaust pipe and other area which is high temperature when car works.
*do not wash your car after this within 2 days. Because the glue need time to work.
Any question, pls feel free to email me: firstname.lastname@example.org