Remove the rust (completely, you might need to remove a bit more paint), then touch up paint (let it dry), then anti-rust grease before installing the spoiler back.
Just don't make it slip. And be gentle. That doesn't mean you can't have fun! I've done some racing with my previous cars!
Worst case, if one day your clutch is gone, then you replace it. A bit costly, but not the end of the world.
Remove all rust with something with a pointy tip. Clean with rubbing alcohol and let dry. Use a dab of touchup paint. Forget about it unless you ever see rust again.
Ran the friction modified version in my 2005 6-6 Accord for 220 000 km and it was still shifting super smooth.
Switched to the AC Delco synchromesh friction modified at around 30 000 km because my 2nd and 3rd gears where notchy, and sometimes the 3rd would pop out of gear. Never had a problem...
What do you guys do when you put sunscreen on and have to drive your car?
Just seat in it and try to clean it later on? With which product?
Or you put a towel on your seat before driving?
I've been having a hard time in the past trying to clean sunscreen from leather seats. But the Integra...
Have it on mine. Your installer had to fiddle a bit because IGLA doesn't list the CTR/ITS in their install procedure. Your installer must know what they are doing. If they do, it is simple.
I would go somewhere else.