Originally Posted by TXSpeedDemon

If a real wet sand didnt' get it out then polishing won't. that means it's all the way through the clear coat. The only option you have is measure the clearcoat sand it down as low as you are comfortable going and polish up what's left. Junkman has a post on the Adam's forums where he took a pretty deep scratch out of the side of a car with this method. It's not perfect but much better.

My girl's car is the same way. It has a pretty demolished hood with several bird dropping etches. The result of 4 years of female ownership.

I used the Adam's 3 step process with 3 passes with the severe, 2 with swirl and haze and 3 with fine polish and they still didn't come all the way out. It did smooth out the surface enough that when cleaned and waxed it isn't noticeable from more than 3-4 inches away... but like you i am OCD and notice it there still. When the car is dirty and not properly reflecting the light it's a bit more noticeable. I does look much better than before though and I do highly recommend their products. With just two passes with the fine machine polish I was able to make my 9 year old Mazda and 3 year old Z both look perfectly brand new.

BTW, I use a Flex polisher not a Portercable