True that. Though it is safe to rinse the car after 24hrs, but conservatively I washed the car with ONR the 3rd day.
I seldom use car shampoo. 95% of the time i use ONR (rinseless wash, Garry Dean Method) and once a month use Meguiar's wash n wax.
Generally, Though OC becomes hydrophobic within no time after applying it, it becomes fully resistant to harsh chemicals within 1 week (7days) and hardens to resist light swirls within a month.
Thank you brother for the compliments.
- Rightly said bro. To cater this issue, i wiped each panel with MF damped with CarPro Eraser, just before applying the OC.
But OC being not so slick to touch has different reason, that is, it's synthetic chemical composition. CQuartz on the other hand is slicker than OC (but less durable), similarly Gtechnique Exo is more slick than CQuartz but again less durable than even CQuartz. And then Sealants are the most slick to the touch but less durable compared to the coatings.
OC comes in a 20cc syringe. 2 Sedans can be easily done with 20cc of OC. I used 9cc on my suzuki Alto. I am left with 11cc of OC which is enough to completely coat one of my friend's City next week, Inshallah.
Initially prime the applicator pad in "X" pattern and then 4-6 drops were enough for Alto's panel. It evaporates into the air instantly within 5 seconds aproximately.
It adds 2 microns to the paint, and those 2 micrones are harder than normal car paint that we have. Which is a plus point i suppose. I don't think any sane person will consider it the way what u are reffering to.

source: Opti Coat 2.0 / Opti-Coat Pro