Jack/Henry, that is interesting; I have never known the polycarbonate type to fracture. However there is a phenomenon in which polymers swell up when they absorb some solvents. Maybe the paint solvent was invasive to the polycarbonate even though it does seem like a hardened material. Gee I thought the lineless multifocals were the answer; now I'll have to "look into" that situation further before I get my next glasses (long overdue).

Don Shillady
Retired Scientist/teen rodder