Has anyone ever used any sprays or paints to protect the cabinet of a speaker?


I bought a pair of JBL Studio 530s that sound phenomenal outside.  Although they are covered by a patio, there is still atmospheric moisture in the air at night when I listen and I would like to protect the cabinets from that moisture.   Suggestions please.  Let 'er rip. 

Thanks!
shtinkydog
I'd be surprised if they didn't already have a coat of polyurethane.

If not, clear, slow-setting poly will preserve them and leave the aesthetics.
Indoor speakers are not designed to be exposed to the elements.  Nothing you do will seal the Cabinet completely and avoid accelerated deterioration.