Cheapest easiest numbers = a roll of 1.5" blue masking tape from Home Depot or similar, put on the doors (or the windows if the car is blue.) Same stuff for the lights - although taping lights is optional. It leaves no residue, unlike many other types of tape.

No worries re simple q's, that's what I'm here for... if you have more, I'll be back online tomorrow, or try to answer from my phone later tonight.

Jon