For painted stripes I always tape them off with painters tape. It has just enough adhesion but rarely is a problem removing (leaving residue).
Now some stripes are underneath the clear coat but this is rare. Just to be safe, tape them off if you are unsure.
Then we have vinyl stripes which may not be burned off like painted stripes but they should also be taped off because product residue can build up along the edges and ruin the detail as it looks UGLY and very unprofessional.
Painted stripes can easily be removed with a PC, compund and cutting pad so I always tape them off even if cleaning/polishing by hand.
Fopr large logos, like the Phoenix on the Trans Am, I tape off the outer edges and then cover the centers with painters paper.
I also use the painters paper on the glass and windshield.
Anthony