Top rolls get alot of exposure to the sun, probably more than any other area. Once it shrinks it would have to be re-covered. No amount of "leather conditioner or rejuvenating magic" will undo this. Going forward it's best to keep the dash covered if it will be exposed to the sun. Most top rolls are dark colored to prevent glare but can be ordered in a lighter color. My top roll was a custom order to match the Buckskin seat color.
1980 SWII LRL-41587C FInj
1976 SS LWB LRE-23114 Harkness RR