Paint whole or take apart

There are ways to do it, look up "My Friend Pete" on youtube, but be warned he cusses and swears sometimes but he's a good body man that puts up how to videos.

I saw one where he uses a foam tape system to mask off the interior of the car at the door jambs. I have used paper folded over and stuffed into the door gaps when shooting primer etc. you can get creative...I am already thinking that i will mask off the wheel wells when i shoot my final 2k primer etc. Its alot of taping but it can be done. in my situation I decided to start assembling the car in between stages of body work. I am in a home garage and time wise cant wait until the whole car is painted to start assembly.