There is a paint/sign shop at the park. It is back by the loop of the train, right before you pass under the bridge to Soak City on the return to Rivertown.
It likely got in the shape it was in because of time. Not everything can be touched up and repainted/repaired every season. There simply isn`t enough time and money to touch up everything every off season. Especially now with a much shorter off season now that the park has Winterfest.
In general, the improvements the park has been making this off season have been amazing. I can`t wait to see them in person. And it is not just the improvements this season. It has been going on for several years. The restoration of the glockenspiel at the Festhaus, small easter eggs in attractions like Orion and Mystic.