I did mine with the Foliatec can listed above.
My 1st time ever using a spray can and they have come out awesome. Painted them as they are installed on vehicle, just applied newspaper all over the back of the car making sure you tuck it in tightly around the tips and use masking tape to hold away from chrome.
My car was only a day old when I did them. So pretty clean but I didn't have to abraid them just applied straight onto chrome. Cars 4 weeks old now and the tips still look awesome with no paint chip so far.
Really easy and out of all the mods I've done it's the most satisfiying to look at knowing it was all my own work!
Nice You tube video on it here and lucky the spray is being applied to an X6 so perfect like for like job.