[drlevy88]

To nail the case, they used an electron microscope to show that the resin was pitted with craters after being semi-digested by the fungus.

Pits should have been visible to the naked eye with enough time. Something that is real good at pitting plastic is house cat urine (after a while it is impossible to scrub the bottom of the litter box clean any more).

[elli1]

Something that is real good at pitting plastic is house cat urine (after a while it is impossible to scrub the bottom of the litter box clean any more).

Are you sure it's pitting as opposed to a deposit...something (calcium?) that has precipitated out of the urine?

[doc30]

Depends on the size of the pits and how big they can grow. Micropits would be invisible on a textured plastic. And they would ultimately make the surface hazy, but the pits themsleves would still be invisible.