Use a razor blade to remove the top coat. Sand the sealer with a DA and 400 grit. spray a sealer, then base coat, and clearcoat. color sand with 1500 grit, then 2000 grit, buff. From start to finish depending on materials you use will set you back anywhere from $600 (a job that may last 1 year) to $1200. This is for materials alone, If you hire someone plan on spending $2500 - $3000, depending on where you live.
How do I know, 30 years of collision experience, 8 years of teaching collision repair.
Good luck using rustolium.