Today, I was able to get the passenger side rear fender wet sanded and buffed to a glossy shine.
It took about 4 hours with quite a bit of orange peel and trash in the paint. Some of the trash you can still see in the paint but it is smooth and shiny...so there's that.
I also bought a used horn with the correct binding posts but it didn't work. The 2nd replacement didn't either. I am still trying to source the correct part and it is proving to be a bit of a challenge, but nothing I can't overcome.