Holy smokes Dan[8D] That's a fine looking extra. You have obviously put an extensive amount of time into the paint,( not to mention puttint to two halves together ), I would try to scuff up the inside and glass it with a light weight glass cloth and thinned down epoxy. I thin mine with rubbing alcohol. I also mount my cowls using the rubber grommets from the servos and the brass bushing. This helps to isolate the vibrations. I didn't put my cowl together, instead I went with stans fibertech. You've done such an awesome job with yours, I'd try to save it with some epoxy.

God Bless,

Jay