I was very surprised that the brake fluid I used to soften the gasket DID not attack the paint. I guess after 52 years, the paint is hard as nails.
I have been using a professional strength goof off to remove the adhesive from my weather strip trim channels around the doors. It attacks the adhesive but it might not attack cured paint, something to try maybe? I didn't care about removing the paint so the methods I used to remove the sealant were too aggressive for your application. I would suggest putting an edge on a paint stick or something else made of wood to prevent scratching.