If the pinstripe has been on there for a long time, you will still see where it was after you remove it. The paint under the pinstripe has been protected from the elements, whereas the rest of your paint will have faded a bit from the sun and been exposed to the elements. What colour is your paint? It will be more noticeable with some colours than others. For example, red paint fades faster than any other colour.
get out the rubbing compound and hit it with a buffer where you took the sripes off.. . . .relly helps to blend in that harsh line where the stripes werewhile you are at it. ... .hit the rest of the car too and give it a good wax... you will behappy with theresults after ou get all the crap off andremove all of the small scratchesand blemishes. .. .