Given that your presumably vinyl pinstripes are going to be applied to your car's surface, it's important that you make sure your surface is primed prior to starting your how to pinstripe process. Optimally, your car's surface should be below 65 degrees Fahrenheit. If it's much hotter than that, the adhesive in your pinstripe tape isn't likely to stick. Also, you'll want to make sure that the area you're looking to pinstripe on your vehicle is free from dust and debris. Small dirt particles can cause bumps in your pinstripes that may be noticeable.
Once your surface is primed, it's time to start applying your pinstripes and upgrading your vehicle's image! The pinstripe application process is the most nerve-wracking how to apply pinstripes step but with some patience, you'll do fine. Figure out how long of an area your first piece of pinstripe tape will need to cover. Grab the appropriate amount of tape and start placing its adhesive area where you'd like it to sit. Be sure that you don't overstretch your tape during its application process or you may end up with areas that will "pop" and won't stick. Once your tape is in place, go over it with your hands and press it down firmly to ensure that it won't shift.
Now that your pinstripes are in place, it's time to throw some finishing touches on them to make your how to pinstripe job shine! If your tape is longer than the surface area you'd like it to cover on your vehicle you can take a tool like an "artist's edge" and carefully remove the excess pinstripe being sure to not carve into your car. Furthermore, if you notice any air bubbles on your pinstripes, take a credit card and carefully work the bubbles out towards the pinstripe's edge.