"lbbs" <v...@none.com> wrote in message
news:10384092...@news.vaxxine.com...
I have had mixed results with several hours' exposure to intense
sunlight; some were then erasable, some were not. Back in the days when
the question was worth asking (erasables cost several dollars each),
there were reports of good and consistent results with a PROM eraser.
No one seems interested now that a new disc is so cheap and a 'repaired'
disc is so thoroughly unreliable.