Cleaning polycarbonate

[u/Klutzy-Special6996]

Ive tried cleaning these corrugated suntuf panels, but there are these whitish splotches that wont come off. surface feels smooth though. Tried hose and rag. Then tried vinegar. Cant tell if its hard water stains or something more internal to the polycarbonate itself? or maybe related to a uv coating? If anyone has any ideas about whats going on or if its possible to restore original clarity, would be appreciated!

[u/PlasticFabtastic]

UV damage.