Your cammo paint is in need of "freshening up." Instead of painting, you may want to consider a cammo wrap.
I've purchased from this place
http://www.camotruckwraps.com/produc...lls-and-Sheets in the past and can attest to this stuff holding up to hunting "situations."
The roof of my cart is Lexan and when I installed it about 5 years ago, I use this companies wrap on the top. After 5 years of rain, snow, heat and cold....it still looks as good as the day it went on. Well....a few tree limbs have scuffed it.....but it still looks great!!
FWIW