Yep. And I'd find time to do it now if at all possible. Once that stuff gets wet it starts to swell and come apart. Painting will be a lot harder and less likely to actually attach to the wood. BTW, use oil paint if you can. At least with "real" wood, oil based paint will bond into the wood. Latex just sits on top and any small incursion of water through the slightest damage to the "skin" will get into the wood and stay there, trapped by the layer of waterproof rubber with no ability to evaporate out. Then the wood rots, unseen, under the paint.Paint it. It will help.