Bodywork & Painting question 71 dart

So i Know you need a covered space for painting but, what about bodywork? and prep for painting??

I should take everything out of the interior and take all the glass and other bits out for the body work guy right? Same guy will also be doing the painting and prep work. thinking of popping this into one of those big car tents since its nigh impossible to find a proper garage to store this around my area, and 95% of homes are on stilts.

also this car has 3-4 layers of different color paint on it, is it going to need sandblasting? (only where bodywork hasnt been done already)