Aftermarket stripes, and the majority of them, no matter the brand name, are produced by 3M. They are just repackaged and remarketed by others.
Get some safety solvent or lighter fluid and soak them. :et them be soaked with the solvent for 5 minutes or more.
That is right, "soak" them, it won't hurt the paint, but will remove any waxes etc. (So after you remove will have to reapply your wax/sealant. If you reapply the stripes, don't re-wax/seal, until the stripes are where you want them to be.)
Then take a hair dryer and carefully heat them and peel them off.
Once off, then use the same solvent and soak the adhesive residue, let it set.
Then dampen a portion of a towel and agitate the adhesive residue to remove.
Once they and the adhesive is gone, you may notice some slight difference in color, that is due to UV ray degradation.
To replace the stripes, you should go to someone who is talented at applying them or you can attmept to do the reapplication. These striping tape are availbale at most larger consumer parts stores and you may attempt to reapply them yourself.
It is really no big deal, unless you can't see a straight line or read and follow the written directions.
Ketch
