No, Absolutely not. Always protect your Car magnets and Reusable Car Decals by removing them before washing the vehicle, clean it with water separately, store flat, and reapply it after surface is clean and dry.
Doing so will help eliminate the possibility of the material getting scratched or damaged, moved by high pressure water, chemicals/ waxes or debris & moisture getting in between the material and the body of the vehicle's surface.
As long as you follow the instruction, your magnetic signs and easy stick vinyl will stay vibrant and works perfectly on your vehicle door for a long time.