After two years, my White Hawk fiberglass looks good. I have zero delamination. My only issue is some slight front end fade. However, I have the darker colored front and I believe your's will be a very light creamy color. That should help and maybe prevent what I experienced.
I wax mine too but for the front end that didn't work to prevent some fading. Otherwise, my exterior looks brand new.
2013 Ford F350 Lariat Crew Cab 4x4 6.7 Diesel 3.55 Long Bed
2013 Jayco White Hawk 30DSRE