Mold Release is the best protection
The reaons you given were probably not the right ones but are on the right track - sort of!.As you know when the gelcoat that is sprayed into the mold does not stick because the mold is coated with a special mold release agent that contains (among other things) silicone resin which when it is set up is one of the most durable materials there is.For example heat-resistant paints use silicone resin (the heatfrom the stove or whatever cures the resin).That is why I cringe when I see brand new boats at shows being "buffed out" by a polishing wheeel. Even the finest grit polish or "liquid wax" contains grit that removes the original "bonded on" mold reelease protection and starts to ear away the surface and allow a better substrate for oxidation. Also, of course the wheel could catch some airborne grit and produce even more damage.I would advise a a completely non-abrasive approach. Either nothing or a "quick detail" silicone based product.Ou Silkenseal forms an even thicker,protective skin. Hope this of some help - I have been waiting to have a go at all the detailers who start to ruin boats from the very beginning by use of abrasive.SincerelyJim WIllis