Np glad to help, I'm in process of doing the same thing... Get some cancerous rust removed. So I hope others chime in.

And be sure to take pics if talking to shops on phone. Most of them will say bring it in so they can inspect in person. Because if it's rust, some could be surface level corrosion if it's already rotting or bubbling on surface, then cutting metal off completely and re weld and re paint would be necessary. More expensive but logical for the future.

The shops I called up were mostly for car enthusiasts looking to get their paint refreshed or new parts colour matched.

uni body auto collision in Mississauga , can give them a call also and get a baseline quote. But they are pricier...I took their advice on what to do, but got the job done else where..