I bought an LG BH14NS40, which is not the best burner for testing media, but I use Opti Drive Control 1.70 to do the scans.
I have left Verbatim BA5 and Ritek BR3 media in the summer sun, face up. So far, the BR3 has withstood about 6 days of 35C weather, and few cloudy days, whilst the BA5 has withstood less, because I put it out later.
My main problem is trying to decide WHEN they fail, because my BH14NS40 seems to be VERY temperature affected. If I attempt to measure maximum transfer rate (12X), then the drive has heated up so much by the end of the test, that the disc scan apparently fails. If I wait until the drive has cooled down at night, then the scan looks fine at 2x, if I only scan the end of the disc 20000-24000.
After about 4 full speed scan attempts, the drive is so hot, that good discs that have not been sun-burned will still make Windows lock up