HiFi, I called Zaino today and asked what they recommend for my white 92' hull. I told them I was going to use presta ultra cut to "restore". They recommended All in One then Z5. Sound about right? I saw you polish then wash off, they said it wasn't needed. YOu agreee? Good post I apprectiated it. I have been have trouble keeping top sides looking good througout the season so I thought I would try something different. thanks Rob
This is a tough one for me to answer as I do not know how oxidized/contaminated your gel is now.
I will never use an all in one anything so I would have to say no to the specific recommendation.
You can start with some sort of machine cutting compound to expose new gel. Follow up with a machine and polish. I like 3M Finesse-It II for polishing step. I would wash boat between stages of recon and final finish. Putting your final finish on a gel surface with byproducts of compounds/polish is a mistake in my book.