Yellow cases.. can they be made white again?

[Lo]

I don't think anything would work short of
soaking the plastic in bleach.  Today I removed
the rather large side speakers off a 1020 PB
monitor and underneath was as white a tan
line as the little girl had whoose dog was pulling her
pants off on the old suntan lotion bottle.  Gee, I
guess that would now be semi-pornographic?

 :-o

[Lo]

the foam cleaner smells similar to oven cleaner spray for the kitchen, perhaps it´s the same (tho i haven´t tested it yet)

Oven cleaner in the US is made with  :pissed: SODIUM HYDROXIDE  :pissed: Very Toxic, burns skin etc.  I suspect it would melt plastic  :-?

Perhaps you meant counter-top spray?