Shelly, I am wondering if a cover is necessary with the PoliGlow? It's made for boats that take rough salt seas and blistering sun.
The instructions said if you are in the tropics to wash it (with regular soap) and give it two light
coats twice a year.
I would think that if could handle tropical sun with those small touchups that maybe it would do fine without a cover.
However, the rivet caps, vent covers and other plastic parts would probably benefit by a cover.
Edited to add... I ordered a cover last winter but have never used it yet. Maybe I should.