rebuilding my 69 ss

heys guys, i just got my 69 elky . i was wondering what are the steps to either dip or powder coat the frame? ill have pics later but how do i do this? the car is all together, i want to replace the both quater panels and the rear window panel also. so if i shop it out how will it be done? the body taken off the frame done then put the body back together with the new quater panels? also around how much would it cost? can you guys give me a ball park figure for the work done, also what would you guys recomend?thanks again guys.