times two :evilchuckstlwagon said:Soap and water is fine. Avoid pressure washing as much as possible. Obviously no abrasives or solvents. After they've been on a few weeks you can wax them.
You can use the car wash, just do not direct the spray at the stripe edge. It will lift the stripe.
I use a nice soft soapy cotton cloth to hand wash the car. If the car has dirt sprayed up from the wheels I might take it to the car wash to knock off some of the rough stuff.
If you wax then you may need to us a toothbrush to knock off the wax at the edge of the stripes, be careful not to rub the bristles under the stripe.
Pics please. :eyepoppin