Yes, I have been using Zep to replace the peeling clear coat paint from the Gel Coat on my rig (the white areas only) for about 7 years.
Adding a coat each year seems to keep the Zep Wax from deteriorating. It takes us about 1 hour to do so.
Removal of the Zep for total replacement is time consuming.
But, Zep does almost perfectly match the original shine of Clear Coat Paint on Gel Coat for us. I have applied it next to a Clear Coated Panel to verify.
Waxing a couple of times per year, using a buffer, is more intense effort than applying and maintaining Zep for me.
I have not used Zep on the color coated painted areas.
1995 38' CC Magna #5280
C8.3L 300hp Cummins, 31,000lbs
Gillig Bus Chassis