If "it", that is the Xzilon coating is still on the car, then taking care of "it" means washing with soap and water and hope it doesn't come off.
Originally Posted by dirmis
A better or at least different approach would be to take care of the paint, not the microscopic coating that may or may not be on the car paint at this time.
To maintain the paint, simply,
First, evaluate the paint with your sense of touch. Feel the paint with your clean hand and feel for bonded contaminants, they'll feel like little bumps on the paint, if discovered ten clay the paint with detailing clay.Clean - If the paint looks good in your yes and your evaluation did not reveal any problems than skip this step. If the condition of the paint doesn't meat your goals then let us know how you want to work, by hand or machine, and we can recommend a product for removing below surface defects.
Second, evaluate the paint visually in good light, both bright sunlight and florescent will work, look for swirls, scratches, water spots, etc.
Polish - Optional, if you want to maximize your gloss and clarity then you can choose to do this step.
Protect - Apply 1-2 coats of your favorite wax or paint sealant.
That's how you take care of the paint on your car. Taking care of a microscopic coating isn't really real-world. Nuff said.
What are you working on?