Just want to update this thread. A few days after this incident, i had some more bird poo spatter on my hood. I got it cleaned off pretty quickly but it was in the sun and did more "Etching".
I am quoting "etching" because apparently it didnt really etch per se, although it appeared to be. The surface was visibly stained, and no amount of waterless wash and rubbing was taking it off. I gave up.
A few wash's later, they're gone! And the original "etch" pictured in the first post was gone too! For the life of me I cannot find it.. it literally disappeared. I was staring at it so hard and so long in full sun that I noticed a good amount of high spots only visible in certain light and angles. So apparently the OC has bonded properly, and is doing as advertised.
So I am giving credit to the OC. Also Chris @ Optimum is a stand-up guy and very helpful although I gave him an earful via Email.
OC has also kicked Spar's A$$$$$$ on my test headlamp. This headlamp is out facing the sky 24/7 with a 50/50 application of Spar/OC. The OC side is 95% as crystal as it was the day I applied it, where the spar is virtually completely yellowed. So I ordered OLens as my new method of restoring headlights.
Side Story: My wifes 2001 CRV got sap bombed from a tree outside the house and since she's a busy lady I havent got to wash it in over 4 weeks!!! Last time this happened I had to strip the car down with APC to get it off, It took 3+ washes on some areas to remove the sap, then I finished the job with OC.
THIS TIME: One pass with a waterless wash and it was all gone.
IMO OC and OLens are legit and well worth the investment.