|I have never heard of plain water damaging CD's. You must of dipped them in paint thinner, or other solvent. |
The underside is made of plastic, can take some scratches and will still play. However, the top side has a thin layer of aluminum which is the data part, with a painted on coating to protect it from damage. If this top layer gets damaged (as you said "become see-through") then the CD is dead.
PowerMac 9600(1 ghz G4)
ATi 9200 PCI