I am refinishing a pair of rocking chairs with fiber rush (paper twine) seats. The chairs were never used and were stored in a dusty damp basement. The seats were never finished and other than a few years of dust are in great shape. Does anyone have a suggestion for gently cleaning the rush seats? I am finishing the oak chair with blond stain and probably a urethane type semi gloss finish. I was thinking I could use a spray flat or semi gloss on the seats to give the color some richness and protect them. Is this a good idea or are there other suggestions? Does anyone have experience with this material? Thanks for your time and support.