I’ve never put those particular stripes on a car, but have done lots of vinyl applications to cars, motorcycles, boats, windshields, etc.
Did you use the “spray bottle and squeegee” technique? Basically, you wet down the car where the stripes will go. The water allows you to move the stripes/vinyl around without it sticking. Just use plain, clean water under the stripes. Once you get them postioned to where you want them, you take the squeegee and work the graphic out form the center, carefully pushing the water out from underneath the graphics and forcing the adhesive down on to the painted surface. Be careful when you first start as the graphic can slip and move until you get a good portion of it applied/stuck. Once it’s stuck, it ain’t coming off in one piece so make sure it’s where you want it.
You will still get “bubbles” with this technique, but they will be minimal.
In order to deal with bubbles you can’t work out to an edge to release, you can take a small sewing needle and prick a small hole in the center of the bubble. Don’t go crazy here, you only want to let water/air out so you only need a teeny-tiny hole to break through the vinyl. Then take your squeegee and work the bubble from it’s edges in to where you made your small prick hole and it will lay flat as the adhesive grabs the surface.
Keep your squeegee wet while doing all this work as a dry squeegee can scratch the graphics or even grab the vinyl/graphics and move it out of position. The water makes sure the squeegee doesn’t grab/scratch your vinyl. Personally, I use a little soapy water (on the outside surfaces only!) to keep the squeegee sliding easily and smoothly. You don’t want to use soapy water when you lay down your graphic, clean water only! The soap residue will hamper the adhesive from doing it’s intended job, so clean water underneath for postioning, soapy water once applied to keep the squeegee sliding nicely.
Or, you can drop the car and strioes off at a vinyl shop and pay them to do it for you. They will use the same process, but if they mess it up, they’re on the hook to replace it. Just read any “condtions” they pass under your nose when you drop the car off to make sure they don’t have a “we’re not responsible” clause on the work order.
Good luck.