Plastic cleaner I have l always used lacquer thinner to clean and de-grease plastic panels. Once they are clean the question becomes "What material are you going to wrap the panel with and what type of adhesive are you going to use?"
If you are going to wrap the plastic with vinyl, then you should use a soft fabric under liner material (felt) on the plastic first. The vinyl will not securely bond directly to most plastics. The under liner will bond to the plastic, and the vinyl will bond to the under liner. The under liner material will also give the piece a slightly softer look and feel.
I also recommend using the Weldwood HHR contact adhesive. Spray both surfaces and let them tack good before applying. You can carefully use a heat gun to help soften the vinyl to go around corners.