They say CD-RWs can be rewritten around a thousand times just like they do for DVD+RW's however my personal experience differs. After 25-30 repeated full rewrite process, error rate skyrcoketed even with good quality media.
If you don't believe me, burn an ISO on a brand new CD-RW disc, then run the Nero disc quality and read speed check. Repeated burn the same ISO file to a brand new rewritable disc. After 20 times or so, check error rate.