I have a 2012 black Si and it also had some blemishes on the paint. A week after I had it I got the protectant put on the paint and interior by the dealer and it took care of all that.
On that run I launched at around 3500 rpm. I just dumped the clutch lol. I still need a lot of practice on the launch. I don't like to abuse my car like that but I am sure it can handle it.
Just got back from wednesday night drags and my best time tonight was 14.943 at 92.23 mph. Still have a lot of practice to get the launch right. I feel kinda bad for betting on my car but It took it like a champ. My mods are K&N intake. I'll be going back in a couple weeks to get more practice...