Cut and replace the rears
Remove and replace new front wings.
Make sure that they acid etch prime the bare metal before priming, but all bodyshops should do this. Though there was this one time, I heard of someone who had his classic Porsche restored and the paint started falling off.
Dont forget that rust is terminal and when its started unless you cut it out it will comeback eventually.
Stay away from the fibreglass posse unless youre just after selling the car on ebay. LOL