Media blast was the only way for me. Follow this link. It shows the car through all it's stages. I had mine blasted and put in epoxy primer. I could pick it up whenever I had time and didn't have to worry about rust. I got all this done for under $1600.00. The key was, make it so all the blaster has to do is walk up to the car and start blasting. Remember, you are paying him buy the hour. Do you want to pay him for 4 hours to clean the window sealer out of the windows, or can you do it at no charge?
His trick to keep from warping was one key procedure. One layer of paint at a time. My car had seven layers of paint. One layer at a time is the key. Hope this helps.
https://lateral-g.net/forums/showthread.php4?t=36556