Yup!! Valuable lesson learned!! Even though I have tons of light in my garage from two different sources AND dual portable hallogens, there's nothing like a dose of sunlight after each and every step to make sure things are going as planned.
As well as use smart techniques of keeping your pad clean.
There's only so many variables with DA polishing...priming / cleaning / pressure / work time / machine speed / arm movement. If you play with them you're bound to get it right eventually.