vinyl is fairly easy to work with, first figure out where yar gonna lay the stipe down,
coat the surface yar gonna do with soapy water (dish washing soap works well) peel the backing partially from your stripe,lay it in place and using a vinyl sign squeege work the soap & air bubbles out peeling the backing as you go. The squeege is available at any of the sign shops and they can probally make your stripe for ya too, the soapy water allows you to move the stripe around a bit and keeps it from sticking to the surface as soon as it touches, for big peices you'll need two people, dont try this on a windy day outside and do not do it on a hot vehicle. If ya gotta go over any thing such as a washer nozzle or air intake grill just work over it and then go back and trim it out with a xacto knife.....