Re: Can I apply fiberglass/plastic panels to my cinder block basement walls?
I would not recommend it. IMHO, it will be money wasted and you're not going to achieve the desired effect. You would be better off to paint it a cheery color and decorate the room with a picture or other things to brighten it.
Efflorescence is the result of moisture passing through the block, so covering it will definitely result in mold and odor issues. Stick to painting.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!