My Bowers and Wilkins CM 1 S2 speakers have developed a film on them. How to I remove it? I have attached a picture of what I am seeing.
Autoglym Super Resin Polish would also be my choice.
The hazing effect is actually tiny micro scratches, probably caused by wiping them down. The polish essentially fills in these tiny scratches so they don't interfere with reflections any more.
It's interesting that specialist guitar polish is mentioned, my mates a bit of a guitar collector (well into double figures last time I saw his collection and that was a year ago) and he swears by Autoglym SRP for all of his guitars. For the ones that stay on display in his lounge he also adds some Autoglym Deep shine after the polish and they properly pop.