The cardboard material does like to absorb moisture and isn't the greatest material for long term longevity. An alternative set could be made from ABS plastic sheet. It will fit in the metal trim surround. And vinyl paint could be used to get a correct color. The grained ABS sheets (4'X8') run 40-50 bucks depending on sourcing. It can be "bent" and formed with a heat gun. Not necessary for the rear trims. And the bonus is that it will never take on any moisture, even if say, one of the kids were to leave a slider open! And it could certainly take a lot more abuse than the cardboard ever could. Just a thought for consideration.
