Originally Posted by UncleWede
Know your enemy
You may also want to try PB Polish+Sealant. It has some minor abrasive properties (you really can't do any harm with it) and might be all you need for this. Depends though, some bird bombs put up quite the fight.
'15 i3 REX // Capparis // ZGW // ZTD // HK // 20"
20% Tint, Coding, LED High Beams/Signals, Painted Reflectors, MAX2 Hardwire
Past: F30 335i, E90 328xi