Maintain your vehicles outside of immediate daylight when not in use. Keeping away from direct sunlight helps prevent graphics from fading prematurely and retains the general condition in the wrap pristine. Hoses and water streams are alright to make use of on vinyl. Just ensure you aren’t blasting your bodywork https://www.apptape.co.uk/blog/top-10-industries-that-benefit-from-fleet-vehicle-wrapping/