how to remove over spray from titanium exhaust tips

[zuperman 370]

Hey guys i have an amuse titanium full burnt tips, anywasys took my car over to the body shop to get some work done, and now when looking at the car closer seems that they got some over spray on the tips, its just tiny white spots here and there hardly noticble but annoying me none the less, and on the top on the tip the serfece is hard on one side as to the smooth texture, now i dont know how to clean titanium serfeces, because i read in more than one place that if you apply the wrong cleaner or clean the tatiatnum burn in the wrong way, it could affect the colour and it could fade away, please guys help me out here