Like many owners of classic AR's, I have multiple speaker grille frames covered with original linen fabric that has suffered varying degrees of discoloration over time. Of course I have thought about replacing the fabric, but since most of them are in otherwise very good condition, I feel that some attempts at cleaning would be a more prudent first option. Regarding the replacement option, I have read many of the CSP threads and opinions, including, but not limited to: Irish and Belgian and Chin