I have used SprayMax 2K urethane rattle can clear coat over gel coat with success. It is a two part paint with a 24 hr useful life in the can after activating the mixture. I have also used it over new base coat to repair some painted areas with success. I purchase it at a local auto paint supply store.
I have also applied 5 coats of the Zep Wet Look to another large area of my gel coat. That result is that it looks just like the adjacent clear coated panels so far. I just applied the acrylic this spring. I have not applied the Wet Look over painted areas yet.....
The preparation took the same amount of time and the application was about 40 minutes versus several hours of masking, waiting for the wind and insects to disappear before 30 minutes of spraying.
After a couple of years of repairing peeling clear coat on gel coat (not base paint), I have found that being very aggressive in the removal of the original clear coat is required. I use a razor blade scraper and have removed all the clear coat from the rear cap of my rig for instance. It will come off in sheets as large as 12" x 24".
Doing the same thing on base coat areas would probably damage the base coat causing it to need respraying of base coat before reapplying clear coat.
When I was not aggressive, the new clear coat lapping over old clear coat would peel off because any remaining old clear coat underneath continued to loosen and open up the adjacent old clear coated areas.